1. 如何消除textbox中按下回车时的beep声音？ Private Sub Text1_KeyPress(KeyAscii As Integer)
If KeyAscii = 13 Then
KeyAscii = 0
End If End Sub
2.Textbox获得焦点时自动选中。 Private Sub Text1_GotFocus()
Text1.SelStart = 0
Text1.SelLength = Len(Text1.Text) End Sub
3.屏蔽textbox控件自身的右键菜单，并显示自己的菜单。 方法一： Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y _ As Single)
If Button = 2 Then
Text1.Enabled = False
Text1.Enabled = True
PopupMenu mymenu
End If End Sub
方法二：回调函数 module： Option Explicit Public OldWindowProc As Long ' 保存默认的窗口函数的地址 Public Const WM_CONTEXTMENU = &H7B ' 当右击文本框时，产生这条消息 Public Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd _
As Long, ByVal nIndex As Long) As Long Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd _
As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal _ lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long Public Function SubClass_WndMessage(ByVal hWnd As Long, ByVal Msg As Long, ByVal wp _
As Long, ByVal lp As Long) As Long ' 如果消息不是WM_CONTEXTMENU，就调用默认的窗口函数处理
If Msg && WM_CONTEXTMENU Then
SubClass_WndMessage = CallWindowProc(OldWindowProc, hWnd, Msg, wp, lp)
Exit Function
SubClass_WndMessage = True End Function 窗体中： Private Const GWL_WNDPROC = (-4) Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y _
As Single)
If Button = 1 Then Exit Sub
OldWindowProc = GetWindowLong(Text1.hWnd, GWL_WNDPROC) ' 取得窗口函数的地址
' 用SubClass_WndMessage代替窗口函数处理消息
Call SetWindowLong(Text1.hWnd, GWL_WNDPROC, AddressOf SubClass_WndMessage) End Sub Private Sub Text1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 1 Then Exit Sub
' 恢复窗口的默认函数
Call SetWindowLong(Text1.hWnd, GWL_WNDPROC, OldWindowProc)
PopupMenu mymenu End Sub
4. 设置TEXTBOX为只读属性 Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd _ As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd _ As Long, ByVal nIndex As Long) As Long Private Const GWL_STYLE = (-16) Private Const EM_SETREADONLY = &HCF Private Sub Command1_Click()
Dim l As Long
If (GetWindowLong(Text1.hwnd, GWL_STYLE) And &H800) Then
Text1.Text = "This is a read/write text box."
'文本窗口是只读窗口,设置为可读写窗口
l = SendMessage(Text1.hwnd, EM_SETREADONLY, False, vbNull)
Text1.BackColor = RGB(255, 255, 255)
'将背景设置为白色
Command1.Caption = "Read&Write" Else
Text1.Text = "This is a readonly text box."
'文本窗口是可读写窗口,设置为只读窗口
l = SendMessage(Text1.hwnd, EM_SETREADONLY, True, vbNull)
Text1.BackColor = vbInactiveBorder
'将背景设置为灰色
Command1.Caption = "&ReadOnly"
End If End Sub
5. 利用API函数MessageBox代替MSGBOX函数可以使得Timer控件正常工作
Private Declare Function MessageBox Lib "user32" Alias "MessageBoxA" (ByVal hwnd As _ Long, ByVal lpText As String, ByVal lpCaption As String, ByVal wType As Long) As Long Private Sub Command1_Click()
MsgBox "时钟变的无效了" End Sub Private Sub Command2_Click()
MessageBox Me.hwnd, "时钟正常运行", "hehe", 0 End Sub Private Sub Timer1_Timer()
Static i As Integer
Text1.Text = i End Sub
Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal _ hWndInsertAfter As Long, ByVal X As Long, ByVal Y As Long, ByVal Cx As Long, ByVal Cy _ As Long, ByVal wFlags As Long) As Long Public Sub SetOnTop(ByVal IsOnTop As Integer) Dim rtn As Long
If IsOnTop = 1 Then
rtn = SetWindowPos(Form1.hwnd, -1, 0, 0, 0, 0, 3)
rtn = SetWindowPos(Form1.hwnd, -2, 0, 0, 0, 0, 3)
End If End Sub Private Sub Command1_Click()
SetOnTop 1
'将窗口置于最上面 End Sub Private Sub Command2_Click()
SetOnTop 0 End Sub
7.只容许运行一个程序实例（利用互斥体）
选择启动对象为sub main() module: Public Declare Function CreateMutex Lib "kernel32" Alias "CreateMutexA" _ (lpMutexAttributes As SECURITY_ATTRIBUTES, ByVal bInitialOwner As Long, ByVal lpName _
As String) As Long Public Type SECURITY_ATTRIBUTES
nLength As Long
lpSecurityDescriptor As Long
bInheritHandle As Long End Type Public Const ERROR_ALREADY_EXISTS = 183& Private Sub Main()
Dim sa As SECURITY_ATTRIBUTES
sa.bInheritHandle = 1
sa.lpSecurityDescriptor = 0
sa.nLength = Len(sa)
Debug.Print CreateMutex(sa, 1, App.Title)
'这一行可千万不能删除啊
Debug.Print Err.LastDllError
If (Err.LastDllError = ERROR_ALREADY_EXISTS) Then
MsgBox "More than one instance"
Form1.Show
End If End Sub
8.窗体标题栏闪烁 Option Explicit Private Declare Function FlashWindow Lib "user32" (ByVal hwnd As Long, ByVal bInvert _
As Long) As Long Private Sub tmrFlash_Timer()
Static mFlash As Boolean
FlashWindow hwnd, Not mFlash End Sub
方法一：利用模拟键盘 Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, _ ByVal dwFlags As Long, ByVal dwExtraInfo As Long) Const theScreen = 1 Const theForm = 0 Private Sub Command1_Click() Call keybd_event(vbKeySnapshot, theForm, 0, 0)
'若theForm改成theScreen则Copy整个Screen DoEvents Picture1.Picture = Clipboard.GetData(vbCFBitmap) End Sub
9. 为程序注册热键
方法一：修改注册表 Private Declare Function RegisterHotKey Lib "user32" (ByVal hWnd As Long, ByVal id _
As Long, ByVal fsModifiers As Long, ByVal vk As Long) As Long Private Declare Function UnregisterHotKey Lib "user32" (ByVal hWnd As Long, ByVal id _ As Long) As Long Private Declare Function PeekMessage Lib "user32" Alias "PeekMessageA" (lpMsg As Msg, _ ByVal hWnd As Long, ByVal wMsgFilterMin As Long, ByVal wMsgFilterMax As Long, ByVal _ wRemoveMsg As Long) As Long Private Declare Function WaitMessage Lib "user32" () As Long Private Type POINTAPI
y As Long End Type Private Type Msg
hWnd As Long
Message As Long
wParam As Long
lParam As Long
time As Long
pt As POINTAPI End Type '
声明常数 Private Const MOD_ALT = &H1 Private Const MOD_CONTROL = &H2 Private Const MOD_SHIFT = &H4 Private Const PM_REMOVE = &H1 Private Const WM_HOTKEY = &H312 Private HotKey_Fg As Boolean Private Sub Form_Load()
Dim Message As Msg
'注册 Ctrl+Y 为热键
RegisterHotKey Me.hWnd, &HBFFF&, MOD_CONTROL, vbKeyY
'RegisterHotKey Me.hWnd, &HBFF2&, MOD_CONTROL, vbKeyU
Form1.Hide
'等待处理消息
HotKey_Fg = False
Do While Not HotKey_Fg
WaitMessage
'检查是否热键被按下
If PeekMessage(Message, Me.hWnd, WM_HOTKEY, WM_HOTKEY, PM_REMOVE) Then
Form1.Show 1
'转让控制权,允许操作系统处理其他事件
Loop End Sub Private Sub Form_Unload(Cancel As Integer)
HotKey_Fg = True
'撤销热键的注册
Call UnregisterHotKey(Me.hWnd, &HBFFF&) End Sub
方法二：SendMessage Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As _ Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Private Const WM_SETHOTKEY = &H32 Private Const HOTKEYF_SHIFT = &H1 Private Const HOTKEYF_ALT = &H4 Private Sub Form_Load()
Dim l As Long
Dim wHotkey As Long
wHotkey = (HOTKEYF_ALT) * (2 ^ 8) + 65
'定义ALT+A为热键
l = SendMessage(Me.hwnd, WM_SETHOTKEY, wHotkey, 0) End Sub
10.在状态栏显示无边框窗体图标。 Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd _ As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd _ As Long, ByVal nIndex As Long) As Long Const GWL_STYLE = (-16&) Const WS_SYSMENU = &H80000 Private Sub Form_Load() 'Make Form's Icon visible in the taskbar SetWindowLong Me.hWnd, GWL_STYLE, GetWindowLong(Me.hWnd, GWL_STYLE) Or WS_SYSMENU End Sub
11. 记录窗体的大小及位置和程序中的一些设置 Private Sub Form_Load()
Me.Width = GetSetting(App.Title, Me.Name, "Width", 7200)
Me.Height = GetSetting(App.Title, Me.Name, "Height", 6300)
Me.Top = GetSetting(App.Title, Me.Name, "Top", 100)
Me.Left = GetSetting(App.Title, Me.Name, "Left", 100)
Check1.Value = GetSetting(App.Title, Me.Name, "check1", 0) End Sub Private Sub Form_Unload(Cancel As Integer)
Call SaveSetting(App.Title, Me.Name, "Width", Me.Width)
Call SaveSetting(App.Title, Me.Name, "Height", Me.Height)
Call SaveSetting(App.Title, Me.Name, "Top", Me.Top)
Call SaveSetting(App.Title, Me.Name, "Left", Me.Left)
Call SaveSetting(App.Title, Me.Name, "check1", Check1.Value) End Sub
12. 解决mschart控件数据更改时的闪动现象 1、在有MSChart控件的窗体中另外加入一个PictureBox控件，如MSChart1和Picture1。
2、使Picture1和MSChart1大小一致，位置相同（通过左对齐和顶端对齐）。
3、使Picture1在MSChart1前端，设置Picture1的Visible为False，即不可见。只有刷新数据时Picture1才显示。
'刷新数据过程
Private Sub Refresh()
Dim V_newchar() 'n维数组
Picture1.Visible = True
MSChart1.ChartData = V_newchar '给MSChart1重新赋值,即刷新数据
MSChart1.EditCopy '将当前图表的图片复制到剪贴板中
Picture1.Picture = Clipboard.GetData() '给Picture1赋值剪贴板中的图片
这样每一次刷新数据时Picture1显示的图片都不会产生闪烁现象
无边框窗体的右键菜单 设计无边框窗体时，如果使用菜单编辑器，就会自动改变成有边框的窗体，此时，可以在另外一个窗体中（一般情况下你的程序应该不止一个窗体的吧，如果真的只有一个，可以利用其他人写的类，添加右键）编辑菜单（VISIBLE属性设为FALSE），然后在本窗体中调用。调用形式如下： Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = 2 Then PopupMenu Form2.mymenu End If End Sub
14.创建圆角无边框窗体 Private Declare Function CreateRoundRectRgn Lib "gdi32" (ByVal X1 As Integer, ByVal Y1 _ As Integer, ByVal X2 As Integer, ByVal Y2 As Integer, ByVal x3 As Integer, ByVal y3 As _ Integer) As Long Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long Private Declare Function SetWindowRgn Lib "user32" (ByVal hwnd As Long, ByVal hrgn As _ Long, ByVal bRedraw As Boolean) As Long Private Sub Form_Load()
hround = CreateRoundRectRgn(0, 0, ScaleX(Form1.ScaleWidth, vbTwips, vbPixels), _ ScaleY(Form1.ScaleHeight, vbTwips, vbPixels), 20, 20) SetWindowRgn Me.hwnd, hround, True DeleteObject hround End Sub
15.拖动没有标题栏的窗体 方法一： Private Declare Function ReleaseCapture Lib "user32" () As Long Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As _ Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Private Const HTCAPTION = 2 Private Const WM_NCLBUTTONDOWN = &HA1 Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Dim ncl As Long
Dim rel As Long
If Button = 1 Then
i = ReleaseCapture()
ncl = SendMessage(hwnd, WM_NCLBUTTONDOWN, HTCAPTION, 0)
End If End Sub 方法二：回调函数 module: Public Const GWL_WNDPROC = (-4) Public Const WM_NCHITTEST = &H84 Public Const HTCLIENT = 1 Public Const HTCAPTION = 2 Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal _ lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, _ ByVal lParam As Long) As Long Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd As _ Long,
ByVal nIndex As Long) As Long Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As _
Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Public prevWndProc As Long Function WndProc(ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal _Param As Long) As Long
WndProc = CallWindowProc(prevWndProc, hWnd, Msg, wParam, lParam)
If Msg = WM_NCHITTEST And WndProc = HTCLIENT Then
WndProc = HTCAPTION
End If End Function 窗体中: Private Sub Form_Load()
prevWndProc = GetWindowLong(Me.hWnd, GWL_WNDPROC)
SetWindowLong Me.hWnd, GWL_WNDPROC, AddressOf WndProc End Sub Private Sub Form_Unload(Cancel As Integer)
SetWindowLong Me.hWnd, GWL_WNDPROC, prevWndProc End Sub
16. 半透明窗体 Private Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, _ ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long Private Const WS_EX_LAYERED = &H80000 Private Const LWA_ALPHA = &H2 Private Const GWL_EXSTYLE = (-20) Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal _
hwnd As Long, ByVal nIndex As Long) As Long Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal _
hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Private Sub Form_Load()
Dim rtn As Long
rtn = GetWindowLong(Me.hwnd, GWL_EXSTYLE)
'取的窗口原先的样式
rtn = rtn Or WS_EX_LAYERED
' 使窗体添加上新的样式WS_EX_LAYERED
SetWindowLong Me.hwnd, GWL_EXSTYLE, rtn
' 把新的样式赋给窗体
SetLayeredWindowAttributes Me.hwnd, 0, 200, LWA_ALPHA End Sub
17.开机启动（函数及常数声明略） Private Sub Form_Load()
Dim hKey As Long, SubKey As String, Exe As String
SubKey = "Software/Microsoft/Windows/CurrentVersion/Run"
Exe = "可执行文件的路径"
RegCreateKey HKEY_CURRENT_USER, SubKey, hKey
RegSetvalueEx hKey, "autorun", 0, REG_SZ, ByVal Exe,LenB(StrConv(Exe, vbFromUnicode)) + 1
RegCloseKey hKey End Sub
18.关闭显示器 Private Declare Function SendMessage Lib "user32" Alias
"SendMessageA" (ByVal hwnd _
As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Const WM_SYSCOMMAND = &H112& Const SC_MONITORPOWER = &HF170& Private Sub Command1_Click()
SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MONITORPOWER, ByVal 2& '关闭显示器 End Sub Private Sub Command2_Click()
SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MONITORPOWER, ByVal -1& '打开显示器 End Sub
19. 在程序结束时自动关闭由SHELL打开的程序。 Private Const PROCESS_QUERY_INFORMATION = &H400
'关闭由SHELL函数打开的文件 Private Const PROCESS_TERMINATE = &H1 Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, _ ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long Private Declare Function TerminateProcess Lib "kernel32" (ByVal hProcess As Long, _
ByVal uExitCode As Long) As Long Dim ProcessId As Long Private Sub Command1_Click()
ProcessId = Shell("notepad.exe.", vbNormalFocus) End Sub Private Sub Form_Unload(Cancel As Integer)
Dim hProcess
hProcess = OpenProcess(PROCESS_TERMINATE Or PROCESS_QUERY_INFORMATION, False, _ ProcessId)
Call TerminateProcess(hProcess, 3838) End Sub
20. 关闭、重启计算机 Public Declare Function ExitWindowsEx Lib "user32" Alias "ExitWindowsEx" (ByVal _
uFlags As Long, ByVal dwReserved As Long) As LongExitWindowsEx 1，0 关机 ExitWindowsEx 0，1 重新启动
21.显示关机提示框 Private Declare Function SHRestartSystemMB Lib "shell32" Alias "#59" (ByVal hOwner _
As Long, ByVal sExtraPrompt As String,
ByVal uFlags As Long) As Long Const EWX_LOGOFF = 0 Const EWX_SHUTDOWN = 1 Const EWX_REBOOT = 2 Const EWX_FORCE = 4 Const EWX_POWEROFF = 8 Private Sub Command1_Click() SHRestartSystemMB Me.hWnd, PROMPT, EWX_LOGOFF End Sub
22.右键托盘图标后必须电击他才可以消失，怎么办？ Case WM_RBUTTONUP '鼠标在图标上右击时弹出菜单
SetForegroundWindow Me.hwnd
Me.PopupMenu mnuTray 加一句 SetForegroundWindow Me.hwnd
23. 将progressbar嵌入statusbar中 Private Declare Function SetParent Lib "user32" (ByVal hWndChild As Long, ByVal _ hWndNewParent As Long) As Long Private Sub Command1_Click()
With ProgressBar1
.Max = 1000
Dim i As Integer
For i = 1 To 1000
.Value = i
End With End Sub Private Sub Form_Load()
ProgressBar1.Appearance = ccFlat
SetParent ProgressBar1.hWnd, StatusBar1.hWnd
ProgressBar1.Left = StatusBar1.Panels(1).Left
ProgressBar1.Top = 100
ProgressBar1.Width = StatusBar1.Panels(1).Width - 50
ProgressBar1.Height = StatusBar1.Height - 150 End Sub
'相对位置你可以自己再调一下
24.使你的程序界面具有XP风格 产生一个和你的可执行程序同名的后缀为exe.manifest的文件，并和可执行文件放在同一路径中。 代码中加入: Private
Declare Sub InitCommonControls Lib "comctl32.dll" () Private Sub Form_Initialize()
InitCommonControls End Sub 注意： 1 工具栏控件一定要用Microsoft Windows Common Controls 5.0，而不要用Microsoft Windows Common Controls 6.0。因为此
InitCommonControls API函数是位于comctl32.dll（Microsoft Windows Common Controls 5.0控件的动态链接库中）。 2 放在FRAME控件中的单远按钮有些“麻烦”！为了解决此问题，可以将单选按钮放在PICTURE控件中（以PICTURE控件作为容器），再将
PICTURE控件放在FRAME控件中，就可以了。 3 必须编译之后才能看到效果 exe.manifest文件中的内容，可用notepad编辑。 &?xml version="1.0" encoding="UTF-8" standalone="yes"?& &assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"& &assemblyIdentity version="1.0.0.0" processorArchitecture="X86" name="CompanyName.ProductName.YourApp" type="win32" /& &description&Your application description here.&/description& &dependency& &dependentAssembly& &assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="X86" publicKeyToken="ccf1df" language="*" /& &/dependentAssembly& &/dependency& &/assembly&
25.如何打印PictureBox中的所有控件
添加另外一个PictureBox，然后： Private Const WM_PAINT = &HF Private Const WM_PRINT = &H317 Private Const PRF_CLIENT = &H4& Private Const PRF_CHILDREN = &H10& Private Const PRF_OWNED = &H20& Private Const PHYSICALOFFSETX As Long = 112 Private Const PHYSICALOFFSETY As Long = 113 Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd _
As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long Private Declare Function GetDeviceCaps Lib "gdi32" (ByVal hdc As Long, ByVal nindex _
As Long) As Long private Sub Form_Load()
Picture1.AutoRedraw = True
Picture2.AutoRedraw = True
Picture2.BorderStyle = 0
Picture2.Visible = False End Sub Private Sub Command2_Click()
Dim retval As Long, xmargin As Single, ymargin As Single
Dim x As Single, y As Single
x = 1: y = 1
With Printer
.ScaleMode = vbInches
xmargin = GetDeviceCaps(.hdc, PHYSICALOFFSETX)
xmargin = (xmargin * .TwipsPerPixelX) / 1440
ymargin = GetDeviceCaps(.hdc, PHYSICALOFFSETY)
ymargin = (ymargin * .TwipsPerPixelY) / 1440
Picture2.Width = Picture1.Width
Picture2.Height = Picture1.Height
Picture1.SetFocus
retval = SendMessage(Picture1.hwnd, WM_PAINT, Picture2.hdc, 0)
retval = SendMessage(Picture1.hwnd, WM_PRINT, Picture2.hdc, _
PRF_CHILDREN + PRF_CLIENT + PRF_OWNED)
Printer.Print ""
.PaintPicture Picture2.Image, x - xmargin, y - ymargin
End With End Sub
26.冒泡排序如下： Sub BubbleSort(List() As Double) Dim First As Double, Last As Double Dim i As Integer, j As Integer Dim Temp As Double First = LBound(List) Last = UBound(List) For i = First To Last - 1 For j = i + 1 To Last If List(i) & List(j) Then Temp = List(j) List(j) = List(i) List(i) = Temp End If Next j Next i End Sub
27.清空回收站
Private Declare Function SHEmptyRecycleBin Lib "shell32.dll" Alias _
"SHEmptyRecycleBinA" (ByVal hwnd As Long, ByVal pszRootPath As String, _
ByVal dwFlags As Long) As Long Private Declare Function SHUpdateRecycleBinIcon Lib "shell32.dll" () As Long Private Const SHERB_NOCONFIRMATION = &H1 Private Const SHERB_NOPROGRESSUI = &H2 Private Const SHERB_NOSOUND = &H4 Private Sub Command1_Click()
Dim retval As Long
' return value
retval = SHEmptyRecycleBin(RecycleBin.hwnd, "", SHERB_NOPROGRESSUI) ' 清空回收站, 确认
' 若有错误出现，则返回回收站图示
If retval && 0 Then
retval = SHUpdateRecycleBinIcon()
End If End Sub Private Sub Command2_Click()
Dim retval As Long
' return value
' 清空回收站, 不确认
retval = SHEmptyRecycleBin(RecycleBin.hwnd, "", SHERB_NOCONFIRMATION)
' 若有错误出现，则返回回收站图示
If retval && 0 Then
retval = SHUpdateRecycleBinIcon()
Command1_Click End Sub
28.获得系统文件夹的路径 Private Declare Function GetSystemDirectory Lib "kernel32" Alias _
"GetSystemDirectoryA" (ByVal lpBuffer As String, ByVal nSize As Long) As Long Private Sub Command1_Click()
Dim syspath As String
Dim len5 As Long
syspath = String(255, 0)
len5 = GetSystemDirectory(syspath, 256)
syspath = Left(syspath, InStr(1, syspath, Chr(0)) - 1)
Debug.Print "System Path : "; syspath End Sub
29.动态增加控件并响应事件 Option Explicit
'通过使用WithEvents关键字声明一个对象变量为新的命令按钮
Private WithEvents NewButton As CommandButton
Private Sub Command1_Click()
If NewButton Is Nothing Then
'增加新的按钮cmdNew
Set NewButton = Controls.Add("VB.CommandButton", "cmdNew", Me)
'确定新增按钮cmdNew的位置
NewButton.Move Command1.Left + Command1.Width + 240, Command1.Top
NewButton.Caption = "新增的按钮"
NewButton.Visible = True
'删除控件(注：只能删除动态增加的控件)
Private Sub Command2_Click()
If NewButton Is Nothing Then
Controls.Remove NewButton
Set NewButton = Nothing
'新增控件的单击事件
Private Sub NewButton_Click()
MsgBox "您选中的是动态增加的按钮！"
30.得到磁盘序列号 Function GetSerialNumber(strDrive As String) As Long
Dim SerialNum As Long
Dim Res As Long
Dim Temp1 As String
Dim Temp2 As String
Temp1 = String$(255, Chr$(0))
Temp2 = String$(255, Chr$(0))
Res = GetVolumeInformation(strDrive, Temp1, Len(Temp1), SerialNum, 0, 0, Temp2, _
Len(Temp2))
GetSerialNumber = SerialNum End Function 调用形式
Label1.Caption = GetSerialNumber("c:/")
31.打开屏幕保护 Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd _
As Long, ByVal wMsg As Long, ByVal wParam
As Long, lParam As Any) As Long '我们将要调用的那个消息，在MSDN中搜索WM_SYSCOMMAND就可以找到具体说明 Const WM_SYSCOMMAND = &H112 '这个参数指明了我们让系统启动屏幕保护 Const SC_SCREENSAVE = &HF140& Private Sub Command1_Click() SendMessage Me.hwnd, WM_SYSCOMMAND, SC_SCREENSAVE, 0 End Sub
32.获得本机IP地址 方法一：利用Winsock控件 winsockip.localip 方法二： Private Const MAX_IP = 255
Private Type IPINFO
dwAddr As Long
dwIndex As Long
dwMask As Long
dwBCastAddr As Long
dwReasmSize As Long
unused1 As Integer
unused2 As Integer
Private Type MIB_IPADDRTABLE
dEntrys As Long
mIPInfo(MAX_IP) As IPINFO
Private Type IP_Array
mBuffer As MIB_IPADDRTABLE
BufferLen As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination _
As Any, Source As Any, ByVal Length As
Private Declare Function GetIpAddrTable Lib "IPHlpApi" (pIPAdrTable As Byte, _
pdwSize As Long, ByVal Sort As Long) As Long
Dim strIP As String
Private Function ConvertAddressToString(longAddr As Long) As String
Dim myByte(3) As Byte
Dim Cnt As Long
CopyMemory myByte(0), longAddr, 4
For Cnt = 0 To 3
ConvertAddressToString = ConvertAddressToString + CStr(myByte(Cnt)) + "."
ConvertAddressToString = Left$(ConvertAddressToString, Len(ConvertAddressToString) - 1)
End Function
Public Sub Start()
Dim Ret As Long, Tel As Long
Dim bBytes() As Byte
Dim Listing As MIB_IPADDRTABLE
On Error GoTo END1
GetIpAddrTable ByVal 0&, Ret, True
If Ret &= 0 Then Exit Sub
ReDim bBytes(0 To Ret - 1) As Byte
GetIpAddrTable bBytes(0), Ret, False
CopyMemory Listing.dEntrys, bBytes(0), 4
strIP = "你机子上有 " & Listing.dEntrys & " 个 IP 地址。" & vbCrLf
strIP = strIP & "------------------------------------------------" & vbCrLf & vbCrLf
For Tel = 0 To Listing.dEntrys - 1
CopyMemory Listing.mIPInfo(Tel), bBytes(4 + (Tel * Len(Listing.mIPInfo(0)))), Len _(Listing.mIPInfo(Tel))
strIP = strIP & "IP 地址 : " & ConvertAddressToString(Listing.mIPInfo(Tel).dwAddr)
Exit Sub END1:
MsgBox "ERROR"
End Sub Private Sub Form_Load()
MsgBox strIP End Sub
33. 用键盘方向键控制COMBOX Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
lParam As Any) As Long Const CB_SHOWDROPDOWN = &H14F Dim bDrop As Boolean Private isDo As Boolean Private Sub Combo1_Click() If Not isDo Then
isDo = True
'&----------回置状态
Else: MsgBox "safd"
End If End Sub Private Sub Combo1_DropDown()
bDrop = True End Sub Private Sub Combo1_KeyDown(KeyCode As Integer, Shift As Integer)
If KeyCode = 40 Then
isDo = False
SendMessage Combo1.hwnd, CB_SHOWDROPDOWN, 1, 0 ElseIf KeyCode = 38 Then
isDo = False
If Combo1.ListIndex = 0 Then
If bDrop Then
bDrop = False
SendMessage Combo1.hwnd, CB_SHOWDROPDOWN, 0, 0
End Sub Private Sub Combo1_KeyUp(KeyCode As Integer, Shift As Integer) If Combo1.Text = Combo1.List(0) Then isDo = True End If End Sub Private Sub Form_Load()
isDo = True
Combo1.AddItem "abcd"
Combo1.AddItem "abcd1"
Combo1.AddItem "abcd2"
Combo1.AddItem "abcd3" End Sub
35.VB下的CRC校验程序 一 计算法 计算法就是依据CRC校验码的产生原理来设计程序。其优点是模块代码少，修改灵活，可移植性好。其缺点为计算量大。为了便于理解，这里假
定了三位数据，而多项式码为A001(hex)。 　　在窗体上放置一命令按钮Command1，并添加如下代码：
　　Private Sub Command1_Click() 　　　Dim CRC() As Byte 　　　Dim d() As Byte '待传输数据 　　　ReDim d(2) As Byte 　　　d(0) = 123 　　　d(1) = 112 　　　d(2) = 135 　　　CRC = CRC16(d) '调用CRC16计算函数 　　　'CRC(0)为高位 　　　'CRC(1)为低位 　　End Sub 　　注意：在数据传输时CRC的低位可能在前，而高位在后。
　　Function CRC16(data() As Byte) As String 　　　Dim CRC16Lo As Byte, CRC16Hi As Byte　　　'CRC寄存器 　　　Dim CL As Byte, CH As Byte　　　　　　　　'多项式码&HA001 　　　Dim SaveHi As Byte, SaveLo As Byte 　　　Dim i As Integer 　　　Dim Flag As Integer 　　　CRC16Lo = &HFF 　　　CRC16Hi = &HFF 　　　CL = &H1 　　　CH = &HA0 　　　For i = 0 To UBound(data) 　　　　CRC16Lo = CRC16Lo Xor data(i) '每一个数据与CRC寄存器进行异或 　　　　For Flag = 0 To 7 　　　　　SaveHi = CRC16Hi 　　　　　SaveLo = CRC16Lo 　　　　　CRC16Hi = CRC16Hi / 2　　　　　　'高位右移一位 　　　　　CRC16Lo = CRC16Lo / 2　　　　　　'低位右移一位 　　　　　If ((SaveHi And &H1) = &H1) Then '如果高位字节最后一位为1 　　　　　　CRC16Lo = CRC16Lo Or &H80　　　'则低位字节右移后前面补1 　　　　　End If　　　　　　　　　　　　　 '否则自动补0 　　　　　If ((SaveLo And &H1) = &H1) Then '如果LSB为1，则与多项式码进行异或 　　　　　　CRC16Hi = CRC16Hi Xor CH 　　　　　　CRC16Lo = CRC16Lo Xor CL 　　　　　End If 　　　　Next Flag 　　　Next i 　　　Dim ReturnData(1) As Byte 　　　ReturnData(0) = CRC16Hi　　　　　　　'CRC高位 　　　ReturnData(1) = CRC16Lo　　　　　　　'CRC低位 　　　CRC16 = ReturnData 　　End Function
2．查表法 　　查表法的优缺点与计算法的正好相反。为了便于比较，这里所有的假定与计算法的完全相同，都而在窗体上放置一个Command1的按钮，其
代码部分与上面的也完全一致。下面只介绍CRC函数的编写源代码。
　　Private Function CRC16(data() As Byte) As String 　　　Dim CRC16Hi As Byte 　　　Dim CRC16Lo As Byte 　　　CRC16Hi = &HFF 　　　CRC16Lo = &HFF 　　　Dim i As Integer 　　　Dim iIndex As Long 　　　For i = 0 To UBound(data) 　　　　iIndex = CRC16Lo Xor data(i) 　　　　CRC16Lo = CRC16Hi Xor GetCRCLo(iIndex)　　　　'低位处理 　　　　CRC16Hi = GetCRCHi(iIndex)　　　　　　　　　　'高位处理 　　　Next i 　　　Dim ReturnData(1) As Byte 　　　ReturnData(0) = CRC16Hi　　　　'CRC高位 　　　ReturnData(1) = CRC16Lo　　　　'CRC低位 　　　CRC16 = ReturnData 　　End Function
　　'CRC低位字节值表 　　Function GetCRCLo(Ind As Long) As Byte 　　　GetCRCLo = Choose(Ind + 1, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40,
&H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1,&H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80,
&H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0,
&HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0,
&H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81,
&H40, &H1, &HC0, &H80, &H41, &H1, &HC0, _ &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80,
&H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0,
&HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1,
&H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81,
&H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1,
&HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40) 　　End Function
　　'CRC高位字节值表 　　Function GetCRCHi(Ind As Long) As Byte 　　　GetCRCHi = Choose(Ind + 1, &H0, &HC0, &HC1, &H1, &HC3, &H3, &H2, &HC2, &HC6, &H6, &H7, &HC7, &H5, &HC5, &HC4, &H4,
&HCC, &HC, &HD, &HCD, &HF, &HCF, &HCE, &HE, &HA, &HCA, &HCB, &HB, &HC9, &H9, &H8, &HC8, &HD8, &H18, &H19, &HD9, &H1B, &HDB,
&HDA, &H1A, &H1E, &HDE, &HDF, &H1F, &HDD, &H1D, &H1C, &HDC, &H14, &HD4, &HD5, &H15, &HD7, &H17, &H16, &HD6, &HD2, &H12, &H13,
&HD3, &H11, &HD1, &HD0, &H10, &HF0, &H30, &H31, &HF1, &H33, &HF3, &HF2, &H32, &H36, &HF6, &HF7, &H37, &HF5, &H35, &H34, &HF4,
&H3C, &HFC, &HFD, &H3D, &HFF, &H3F, &H3E, &HFE, &HFA, &H3A, &H3B, &HFB, &H39, &HF9, &HF8, &H38, &H28, &HE8, &HE9, &H29, &HEB,
&H2B, &H2A, &HEA, &HEE, &H2E, &H2F, &HEF, &H2D, &HED, &HEC, &H2C, &HE4, &H24, &H25, &HE5, &H27, &HE7, &HE6, &H26, &H22, &HE2,
&HE3, &H23, &HE1, &H21, &H20, &HE0, &HA0, &H60, _ &H61, &HA1, &H63, &HA3, &HA2, &H62, &H66, &HA6, &HA7, &H67, &HA5, &H65, &H64, &HA4, &H6C, &HAC, &HAD, &H6D, &HAF, &H6F, &H6E,
&HAE, &HAA, &H6A, &H6B, &HAB, &H69, &HA9, &HA8, &H68, &H78, &HB8, &HB9, &H79, &HBB, &H7B, &H7A, &HBA, &HBE, &H7E, &H7F, &HBF,
&H7D, &HBD, &HBC, &H7C, &HB4, &H74, &H75, &HB5, &H77, &HB7, &HB6, &H76, &H72, &HB2, &HB3, &H73, &HB1, &H71, &H70, &HB0, &H50,
&H90, &H91, &H51, &H93, &H53, &H52, &H92, &H96, &H56, &H57, &H97, &H55, &H95, &H94, &H54, &H9C, &H5C, &H5D, &H9D, &H5F, &H9F,
&H9E, &H5E, &H5A, &H9A, &H9B, &H5B, &H99, &H59, &H58, &H98, &H88, &H48, &H49, &H89, &H4B, &H8B, &H8A, &H4A, &H4E, &H8E, &H8F,
&H4F, &H8D, &H4D, &H4C, &H8C, &H44, &H84, &H85, &H45, &H87, &H47, &H46, &H86, &H82, &H42, &H43, &H83, &H41, &H81, &H80, &H40) 　　End Function
36.如何打开光驱 Public Declare Function CDdoor Lib "winmm.dll" Alias "mciSendStringA" (ByVal lpstrCommand As String, ByVal lpstrReturnStringAs String, ByVal uReturnLength As Long, ByVal hwndCallback As Long) As Long Call CDdoor("set CDAudio door open", 0, 0, 0) '打开光驱 Call CDdoor("set CDAudio door closed", 0, 0, 0) '关闭光驱
36.检测是否以联网及联网方式 module: Public Declare Function InternetGetConnectedStateEx Lib "wininet.dll" _
Alias "InternetGetConnectedStateExA" _
(ByRef lpdwFlags As Long, _
ByVal lpszConnectionName As String, _
ByVal dwNameLen As Long, _
ByVal dwReserved As Long _
Public Enum EIGCInternetConnectionState
INTERNET_CONNECTION_MODEM = &H1&
INTERNET_CONNECTION_LAN = &H2&
INTERNET_CONNECTION_PROXY = &H4&
INTERNET_RAS_INSTALLED = &H10&
INTERNET_CONNECTION_OFFLINE = &H20&
INTERNET_CONNECTION_CONFIGURED = &H40& End Enum
Public Property Get InternetConnected( _
Optional ByRef eConnectionInfo As EIGCInternetConnectionState, _
Optional ByRef sConnectionName As String _
) As Boolean
Dim dwFlags As Long
Dim sNameBuf As String
Dim lR As Long
Dim iPos As Long
sNameBuf = String$(513, 0)
lR = InternetGetConnectedStateEx(dwFlags, sNameBuf, 512, 0&)
eConnectionInfo = dwFlags
iPos = InStr(sNameBuf, vbNullChar)
If iPos & 0 Then
sConnectionName = Left$(sNameBuf, iPos - 1)
ElseIf Not sNameBuf = String$(513, 0) Then
sConnectionName = sNameBuf
InternetConnected = (lR = 1) End Property 窗体中 Private Sub Form_Load()
' Determine whether we have a connection:
bConnected = InternetConnected(eR, sName)
' The connection state info parameter provides details
' about how we connect:
If (eR And INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM Then
sMsg = sMsg & "Connection uses a modem." & vbCrLf
If (eR And INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN Then
sMsg = sMsg & "Connection uses LAN." & vbCrLf
If (eR And INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY Then
sMsg = sMsg & "Connection is via Proxy." & vbCrLf
If (eR And INTERNET_CONNECTION_OFFLINE) = INTERNET_CONNECTION_OFFLINE Then
sMsg = sMsg & "Connection is Off-line." & vbCrLf
If (eR And INTERNET_CONNECTION_CONFIGURED) = INTERNET_CONNECTION_CONFIGURED Then
sMsg = sMsg & "Connection is Configured." & vbCrLf
sMsg = sMsg & "Connection is Not Configured." & vbCrLf
If (eR And INTERNET_RAS_INSTALLED) = INTERNET_RAS_INSTALLED Then
sMsg = sMsg & "System has RAS installed." & vbCrLf
' Display the connection name and info:
If bConnected Then
Text1.Text = "Connected: " & sName & vbCrLf & vbCrLf & sMsg
Text1.Text = "Not Connected: " & sName & vbCrLf & vbCrLf & sMsg
End If End Sub
37.得到当前windows的版本号
module: Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long
szCSDVersion As String * 128 ' Maintenance string for PSS usage End Type Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA" (lpVersionInformation As OSVERSIONINFO) As Long Declare Function GetSystemMetrics Lib "user32" (ByVal nIndex As Long) As LongEnd Sub
41.如何在小画面上显示大图片 方法一： 一个picturebox控件，一个image控件（以picturebox为容器），图片加载在image中，一个HScroll1，VScroll1（以picturebox为容器）。 Private Sub Bar1_Change() Image1.Left = -bar1.Value End Sub
Private Sub Bar2_Change() Image1.Top = -Bar2.Value End Sub
Private Sub Form_Load() Image1.Left = 0 Image1.Top = 0 bar1.SmallChange = 300 Bar2.SmallChange = 300 bar1.Max = Image1.Width - Picture1.Width Bar2.Max = Image1.Height - Picture1.Height bar1.Min = 0 Bar2.Min = 0 End Sub
方法二：利用鼠标移动图片 一个picturebox控件，一个image控件（以picturebox为容器），图片加载在image中 Dim ix As Integer Dim iy As Integer Private Sub Form_Load() Image1.Left = 0 Image1.Top = 0 End Sub Private Sub Image1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = vbLeftButton Then ix = X iy = Y End If End Sub Private Sub Image1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single) Dim ipx As Integer Dim ipy As Integer If Button = vbLeftButton Then ipx = Image1.Left + X - ix ipy = Image1.Top + Y - iy If ipx & 0 Then Image1.Left = 0 Else If ipx & Picture1.Width - Image1.Width Then ipx = Picture1.Width - Image1.Width Else Image1.Left = ipx End If End If If ipy & 0 Then Image1.Top = 0 Else If ipy & Picture1.Height - Image1.Height Then ipy = Picture1.Height - Image1.Height Else Image1.Top = ipy End If End If End If End Sub Private Sub Image1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single) Me.MousePointer = 0 End Sub
42. 使窗体不出屏幕左边界 module: Option Explicit Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" _
(ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" _
(ByVal hwnd As Long, ByVal nIndex As Long) As Long Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" _
(ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal Msg As Long, _
ByVal wParam As Long, ByVal lParam As Long) As Long
Declare Sub CopyMemory Lib "KERNEL32" Alias "RtlMoveMemory" ( _
lpvDest As Any, lpvSource As Any, ByVal cbCopy As Long) Public Const GWL_WNDPROC = (-4) Public Const WM_WINDOWPOSCHANGING = &H46 Type WINDOWPOS
hwnd As Long
hWndInsertAfter As Long
cx As Long
cy As Long
flags As Long End Type Public preWinProc As Long '而重点就在於Window重新定位之前会传 '出WM_WINDOWPOSCHANGING这个讯息，而lParam指向一个WINDOWPOS的STRUCTURE。 Public Function wndproc(ByVal hwnd As Long, ByVal Msg As Long, _
ByVal wParam As Long, ByVal lParam As Long) As Long
Dim lwd As Long, hwd As Long
If Msg = WM_WINDOWPOSCHANGING Then
Dim WPOS As WINDOWPOS
CopyMemory WPOS, ByVal lParam, Len(WPOS)
If WPOS.x & 0 Then
WPOS.x = 0
CopyMemory ByVal lParam, WPOS, Len(WPOS)
'将之送往原来的Window Procedure
wndproc = CallWindowProc(preWinProc, hwnd, Msg, wParam, lParam) End Function 窗体中 Sub Form_Load()
Dim ret As Long '记录原本的Window Procedure的位址
preWinProc = GetWindowLong(Me.hwnd, GWL_WNDPROC)
ret = SetWindowLong(Me.hwnd, GWL_WNDPROC, AddressOf wndproc) End Sub
Private Sub Form_Unload(Cancel As Integer)
Dim ret As Long
'取消Message的截取，而使之又只送往原来的Window Procedure
ret = SetWindowLong(Me.hwnd, GWL_WNDPROC, preWinProc) End Sub
43.打开指定的窗体 Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long Const SW_SHOWNORMAL = 1 Private Sub Command1_Click() '我的文档 ShellExecute Me.hwnd, "open", "explorer", vbNullString, vbNullString, 1 End Sub Private Sub Command2_Click() '我的电脑 ShellExecute Me.hwnd, "open", "explorer", "::{20D04FE0-3AEA--D}", vbnulstring, 1 End Sub Private Sub Command3_Click() '网上邻居 ShellExecute Me.hwnd, "open", "explorer", "::{208d2c60-3aea--d}", vbNullString, 1 End Sub Private Sub Command4_Click() '回收站 ShellExecute Me.hwnd, "open", "explorer", "::{645ff040-f08-00aa002f954e}", vbNullString, 1 End Sub Private Sub Command5_Click() '控制面板 ShellExecute Me.hwnd, "open", "explorer", "::{21ec2020-3aea-1069-a2dd-d}", vbNullString, 1 End Sub Private Sub Command6_Click() '打开指定的路径 ShellExecute Me.hwnd, "open", "D:/vb练习事例", vbNullString, vbNullString, 1 End Sub Private Sub Command7_Click() '音量控制
Shell "sndvol32.exe", vbNormalFocus End Sub
44.窗体分割条
splitter为一picturebox控件。 Option Explicit Private Const SPLT_WDTH As Integer = 35 Private currSplitPosX As Long Dim CTRL_OFFSET As Integer Dim SPLT_COLOUR As Long Private Sub Form_Load() CTRL_OFFSET = 5 SPLT_COLOUR = &H808080 currSplitPosX = &H7FFFFFFF ListLeft.AddItem "VB俱乐部" ListLeft.AddItem "VB动画篇" ListLeft.AddItem "VB网络篇" ListLeft.AddItem "VB控件类" ListLeft.AddItem "VB界面类" TextRight = "经常见到窗体上有二个相邻的列表框，可以用鼠标任意拉动中间分割条，改变列表框大小。" End Sub Private Sub Form_Resize() Dim x1 As Integer Dim x2 As Integer Dim height1 As Integer Dim width1 As Integer Dim width2 As Integer On Error Resume Next height1 = ScaleHeight - (CTRL_OFFSET * 2) x1 = CTRL_OFFSET width1 = ListLeft.Width x2 = x1 + ListLeft.Width + SPLT_WDTH - 1 width2 = ScaleWidth - x2 - CTRL_OFFSET ListLeft.Move x1% - 1, CTRL_OFFSET, width1, height1 TextRight.Move x2, CTRL_OFFSET, width2 + 1, height1 Splitter.Move x1 + ListLeft.Width - 1, CTRL_OFFSET, SPLT_WDTH, height1 End Sub Private Sub Splitter_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = vbLeftButton Then
Splitter.BackColor = SPLT_COLOUR
currSplitPosX = CLng(X) Else
If currSplitPosX && &H7FFFFFFF Then Splitter_MouseUp Button, Shift, X, Y
currSplitPosX = &H7FFFFFFF End If End Sub Private Sub Splitter_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single) If currSplitPosX& && &H7FFFFFFF ThenIf CLng(X) && currSplitPosX Then Splitter.Move Splitter.Left + X, CTRL_OFFSET, SPLT_WDTH, ScaleHeight - (CTRL_OFFSET * 2) currSplitPosX = CLng(X) End If End If End Sub Private Sub Splitter_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single) If currSplitPosX && &H7FFFFFFF Then If CLng(X) && currSplitPosX Then
Splitter.Move Splitter.Left + X, CTRL_OFFSET, SPLT_WDTH, ScaleHeight - (CTRL_OFFSET * 2) End If currSplitPosX = &H7FFFFFFF Splitter.BackColor = &H8000000F If Splitter.Left & 60 And Splitter.Left & (ScaleWidth - 60) Then ListLeft.Width = Splitter.Left - ListLeft.Left ElseIf Splitter.Left & 60 Then
ListLeft.Width = 60 Else
ListLeft.Width = ScaleWidth - 60 End If
Form_Resize End If
44.托盘程序 module: Option Explicit Public preWinProc As Long Public NewForm As Form Public NewMenu As Menu Public Const WM_USER = &H400 Public Const WM_LBUTTONUP = &H202 Public Const WM_MBUTTONUP = &H208 Public Const WM_RBUTTONUP = &H205 Public Const TRAY_CALLBACK = (WM_USER + 1001&) Public Const GWL_WNDPROC = (-4) Public Const GWL_USERDATA = (-21) Public Const NIF_ICON = &H2 Public Const NIF_TIP = &H4 Public Const NIM_ADD = &H0 Public Const NIF_MESSAGE = &H1 Public Const NIM_MODIFY = &H1 Public Const NIM_DELETE = &H2 Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Declare Function Shell_NotifyIcon Lib "shell32.dll" Alias "Shell_NotifyIconA" (ByVal dwMessage As Long, lpData As NOTIFYICONDATA) As Long Public Type NOTIFYICONDATA
cbSize As Long
hwnd As Long
uID As Long
uFlags As Long
uCallbackMessage As Long
hIcon As Long
szTip As String * 64 End Type Private NOTI As NOTIFYICONDATA Public Function NewWindone(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
If Msg = TRAY_CALLBACK Then
If lParam = WM_LBUTTONUP Then
' 单击左键，弹出窗口
If NewForm.WindowState = vbMinimized Then _
NewForm.WindowState = NewForm.LastState
NewForm.SetFocus
Exit Function
If lParam = WM_RBUTTONUP Then
' 单击右键，弹出菜单
NewForm.PopupMenu NewMenu
Exit Function
NewWindone = CallWindowProc(preWinProc, hwnd, Msg, wParam, lParam) End Function Public Sub AddToTray(frm As Form, mnu As Menu)
Set NewForm = frm
Set NewMenu = mnu
preWinProc = SetWindowLong(frm.hwnd, GWL_WNDPROC, AddressOf NewWindone)
.hwnd = frm.hwnd
.cbSize = Len(NOTI)
.hIcon = frm.Icon.Handle
.uFlags = NIF_ICON
.uCallbackMessage = TRAY_CALLBACK
.uFlags = .uFlags Or NIF_MESSAGE
.cbSize = Len(NOTI)
Shell_NotifyIcon NIM_ADD, NOTI End Sub '屏蔽托盘 Public Sub RemoveFromTray()
.uFlags = 0
Shell_NotifyIcon NIM_DELETE, NOTI
SetWindowLong NewForm.hwnd, GWL_WNDPROC, preWinProcEnd Sub
Public Sub SetTrayTip(tip As String)
.szTip = tip & vbNullChar
.uFlags = NIF_TIP
Shell_NotifyIcon NIM_MODIFY, NOTI End Sub
Public Sub SetTrayIcon(pic As Picture)
If pic.Type && vbPicTypeIcon Then Exit Sub
.hIcon = pic.Handle
.uFlags = NIF_ICON
Shell_NotifyIcon NIM_MODIFY, NOTI End Sub 窗体中
Private Sub Form_Load()
AddToTray Me, Tray
SetTrayTip "托盘演示" End Sub Private Sub Form_Unload(Cancel As Integer)
RemoveFromTray End Sub
45.led数值显示 添加类模块：（name属性为mcLCD） Option Explicit Private Type Coordinate X As Integer Y As Integer End Type Dim BasePoint As Coordinate Dim SegWidth As Integer Dim SegHeight As Integer Dim p As PictureBox Property Let BackColor(Color As Long) p.BackColor = Color End Property Private Sub DrawNumber(Number As Integer) Select Case Number Case 0 DrawSegment (1): DrawSegment (2): DrawSegment (3): DrawSegment (4) DrawSegment (5): DrawSegment (6) Case 1 DrawSegment (2): DrawSegment (3) Case 2 DrawSegment (1): DrawSegment (2): DrawSegment (7): DrawSegment (5) DrawSegment (4) Case 3 DrawSegment (1): DrawSegment (2): DrawSegment (7): DrawSegment (3) DrawSegment (4) Case 4 DrawSegment (2): DrawSegment (3): DrawSegment (7): DrawSegment (6) Case 5 DrawSegment (1): DrawSegment (6): DrawSegment (7): DrawSegment (3) DrawSegment (4) Case 6 DrawSegment (1): DrawSegment (6): DrawSegment (7): DrawSegment (3) DrawSegment (4): DrawSegment (5) Case 7 DrawSegment (1): DrawSegment (2) DrawSegment (3) Case 8 DrawSegment (1): DrawSegment (2): DrawSegment (3): DrawSegment (4) DrawSegment (5): DrawSegment (6): DrawSegment (7) Case 9 DrawSegment (1): DrawSegment (2): DrawSegment (3): DrawSegment (4) DrawSegment (6): DrawSegment (7) End Select End Sub Private Sub DrawSegment(SegNum As Integer) ' 1 ' ___ ' | | ' 6 | | 2 ' |-7-| ' 5 | | 3 ' |___| ' ' 4 '画出七段数码管的七个组成部分 Select Case SegNum Case 1 p.Line (BasePoint.X + 1, BasePoint.Y)-(BasePoint.X + SegWidth - 1, BasePoint.Y) p.Line (BasePoint.X + 2, BasePoint.Y + 1)-(BasePoint.X + SegWidth - 2, BasePoint.Y + 1) p.Line (BasePoint.X + 3, BasePoint.Y + 2)-(BasePoint.X + SegWidth - 3, BasePoint.Y + 2) Case 2 p.Line (BasePoint.X + SegWidth - 1, BasePoint.Y + 1)-(BasePoint.X + SegWidth - 1, BasePoint.Y + (SegHeight / 2) - 1) p.Line (BasePoint.X + SegWidth - 2, BasePoint.Y + 2)-(BasePoint.X + SegWidth - 2, BasePoint.Y + (SegHeight / 2)) p.Line (BasePoint.X + SegWidth - 3, BasePoint.Y + 3)-(BasePoint.X + SegWidth - 3, BasePoint.Y + (SegHeight / 2) - 1) Case 3 p.Line (BasePoint.X + SegWidth - 1, BasePoint.Y + (SegHeight / 2) + 2)-(BasePoint.X + SegWidth - 1, BasePoint.Y + SegHeight) p.Line (BasePoint.X + SegWidth - 2, BasePoint.Y + (SegHeight / 2) + 1)-(BasePoint.X + SegWidth - 2, BasePoint.Y + SegHeight - 1) p.Line (BasePoint.X + SegWidth - 3, BasePoint.Y + (SegHeight / 2) + 2)-(BasePoint.X + SegWidth - 3, BasePoint.Y + SegHeight - 2) Case 4 p.Line (BasePoint.X + 3, BasePoint.Y + SegHeight - 2)-(BasePoint.X + SegWidth - 3, BasePoint.Y + SegHeight - 2)p.Line (BasePoint.X + 2, BasePoint.Y + SegHeight - 1)-(BasePoint.X + SegWidth - 2, BasePoint.Y + SegHeight - 1) p.Line (BasePoint.X + 1, BasePoint.Y + SegHeight)-(BasePoint.X + SegWidth - 1, BasePoint.Y + SegHeight) Case 5 p.Line (BasePoint.X, BasePoint.Y + (SegHeight / 2) + 2)-(BasePoint.X, BasePoint.Y + SegHeight) p.Line (BasePoint.X + 1, BasePoint.Y + (SegHeight / 2) + 1)-(BasePoint.X + 1, BasePoint.Y + SegHeight - 1) p.Line (BasePoint.X + 2, BasePoint.Y + (SegHeight / 2) + 2)-(BasePoint.X + 2, BasePoint.Y + SegHeight - 2) Case 6 p.Line (BasePoint.X, BasePoint.Y + 1)-(BasePoint.X, BasePoint.Y + (SegHeight / 2) - 1) p.Line (BasePoint.X + 1, BasePoint.Y + 2)-(BasePoint.X + 1, BasePoint.Y + (SegHeight / 2)) p.Line (BasePoint.X + 2, BasePoint.Y + 3)-(BasePoint.X + 2, BasePoint.Y + (SegHeight / 2) - 1) Case 7 p.Line (BasePoint.X + 3, BasePoint.Y + (SegHeight / 2) - 1)-(BasePoint.X + SegWidth - 3, BasePoint.Y + (SegHeight / 2) - 1) p.Line (BasePoint.X + 2, BasePoint.Y + (SegHeight / 2))-(BasePoint.X + SegWidth - 2, BasePoint.Y + (SegHeight / 2)) p.Line (BasePoint.X + 3, BasePoint.Y + (SegHeight / 2) + 1)-(BasePoint.X + SegWidth - 3, BasePoint.Y + (SegHeight / 2) + 1) End Select End Sub Public Property Let Caption(ByVal Value As String) Dim OrigX As Integer OrigX = BasePoint.X p.Cls While Value && "" If Left$(Value, 1) && ":" And Left$(Value, 1) && "." Then DrawNumber (Val(Left$(Value, 1))) BasePoint.X = BasePoint.X + SegWidth + 3 Else If Left$(Value, 1) = "." Then p.Line (BasePoint.X + (SegWidth / 2) - 4, BasePoint.Y + (SegHeight / 2) + 6)-(BasePoint.X + (SegWidth / 2), BasePoint.Y + (SegHeight / 2) + 9), , BF BasePoint.X = BasePoint.X + SegWidth Else p.Line (BasePoint.X + (SegWidth / 2) - 4, BasePoint.Y + (SegHeight / 2) - 6)-(BasePoint.X + (SegWidth / 2), BasePoint.Y + (SegHeight / 2) - 3), , BF p.Line (BasePoint.X + (SegWidth / 2) - 4, BasePoint.Y + (SegHeight / 2) + 4)-(BasePoint.X + (SegWidth / 2), BasePoint.Y + (SegHeight / 2) + 7), , BF BasePoint.X = BasePoint.X + SegWidth End If End If Value = Right$(Value, Len(Value) - 1) Wend BasePoint.X = OrigX End Property Property Let ForeColor(Color As Long) p.ForeColor = Color End Property
Public Sub NewLCD(PBox As PictureBox) Set p = PBox p.ScaleMode = 3 ' pixel p.AutoRedraw = True BasePoint.X = 2 BasePoint.Y = 2 SegHeight = p.ScaleHeight - 6 SegWidth = (SegHeight / 2) + 2 End Sub 窗体中： Option Explicit Dim lcdTest1 As New mcLCD Private Sub Form_Load() lcdTest1.NewLCD picture1 End Sub Private Sub Timer1_Timer() lcdTest1.Caption = Time End Sub
48.将部分菜单放置在窗体的最右段（如帮助等） 在菜单编辑器中在待放置于最右段的菜单前加一标题为空格的菜单，并去掉visable属性前钩号。 Private Type MENUITEMINFO '.......请自己加上啊
End Type Private Const MFT_RIGHTJUSTIFY = &H4000 'API函数声明 Private Declare Function SetMenuItemInfo Lib "user32" Alias "SetMenuItemInfoA" (ByVal _ hMenu As Long, ByVal un As Long, ByVal bool As Boolean, lpcMenuItemInfo As _ MENUITEMINFO) As Long Private Declare Function GetMenuItemInfo Lib "user32" Alias "GetMenuItemInfoA" (ByVal _ hMenu As Long, ByVal un As Long, ByVal b As Long, lpMenuItemInfo As MENUITEMINFO) As LongPrivate Declare Function DrawMenuBar Lib "user32" (ByVal hwnd As Long) As Long Private Declare Function GetMenu Lib "user32" (ByVal hwnd As Long) As Long '在窗体载入过程（也可放在其他过程）中对菜单设置进行更改 Private Sub Form_Load() Dim my_menuItemInfo As MENUITEMINFO Dim return_value As Long my_menuItemInfo.cbSize = 44 my_menuItemInfo.fMask = 16 my_menuItemInfo.cch = 128 my_menuItemInfo.dwTypeData = Space$(128) return_value = GetMenuItemInfo(GetMenu(Me.hwnd), 2, 1, my_menuItemInfo)
'这里的2请根据自己的情况而定，为正常显示在左端的菜单数 my_menuItemInfo.fType = MFT_RIGHTJUSTIFY return_value = SetMenuItemInfo(GetMenu(Me.hwnd), 2, 1, my_menuItemInfo) End Sub
46.List每行以相应的内容为提示 '----------------------By 陈锐------------------------------ '如果你要在Internet或BBS上转贴文章,请通知我知道（没有通知，不知道犯不犯法，呵呵） '这个程序演示如何给List Box的每个列表行加上不同的提示行 '运行该程序，当鼠标移动到任一行上后，弹出的ToolTip就会提示该行的完整内容 'Option Explicit Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _
lParam As Any) As Long Private Const LB_ITEMFROMPOINT = &H1A9 Private Sub Form_Load()
With List1
.AddItem "陈锐 "
.AddItem "陈锐 "
.AddItem "陈锐 "
End With End Sub Private Sub List1_MouseMove(Button As Integer, Shift As Integer, _ X As Single, Y As Single)
' present related tip message
Dim lXPoint As Long
Dim lYPoint As Long
Dim lIndex As Long
If Button = 0 Then ' 如果没有按钮被按下
lXPoint = CLng(X / Screen.TwipsPerPixelX)
lYPoint = CLng(Y / Screen.TwipsPerPixelY)
With List1
' 获得当前的光标所在的的屏幕位置确定标题位置
lIndex = SendMessage(.hwnd, LB_ITEMFROMPOINT, 0, _
ByVal ((lYPoint * 65536) + lXPoint))
' 显示提示行或清除提示行
If (lIndex &= 0) And (lIndex &= .ListCount) Then
.ToolTipText = .List(lIndex)
.ToolTipText = ""
End If End Sub
47.将部分菜单放置在窗体的最右段（如帮助等） 在菜单编辑器中在待放置于最右段的菜单前加一标题为空格的菜单，并去掉visable属性前钩号。 Private Type MENUITEMINFO '.......请自己加上啊
End Type Private Const MFT_RIGHTJUSTIFY = &H4000 'API函数声明 Private Declare Function SetMenuItemInfo Lib "user32" Alias "SetMenuItemInfoA" (ByVal _ hMenu As Long, ByVal un As Long, ByVal bool As Boolean, lpcMenuItemInfo As _ MENUITEMINFO) As Long Private Declare Function GetMenuItemInfo Lib "user32" Alias "GetMenuItemInfoA" (ByVal _ hMenu As Long, ByVal un As Long, ByVal b As Long, lpMenuItemInfo As MENUITEMINFO) As Long Private Declare Function DrawMenuBar Lib "user32" (ByVal hwnd As Long) As Long Private Declare Function GetMenu Lib "user32" (ByVal hwnd As Long) As Long '在窗体载入过程（也可放在其他过程）中对菜单设置进行更改 Private Sub Form_Load() Dim my_menuItemInfo As MENUITEMINFO Dim return_value As Long my_menuItemInfo.cbSize = 44 my_menuItemInfo.fMask = 16 my_menuItemInfo.cch = 128 my_menuItemInfo.dwTypeData = Space$(128) return_value = GetMenuItemInfo(GetMenu(Me.hwnd), 2, 1, my_menuItemInfo)
'这里的2请根据自己的情况而定，为正常显示在左端的菜单数 my_menuItemInfo.fType = MFT_RIGHTJUSTIFY return_value = SetMenuItemInfo(GetMenu(Me.hwnd), 2, 1, my_menuItemInfo) End Sub 48. 改变屏幕分辨率 Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" (lpString1 As Any, lpString2 As Any) As Long Private Const CCHDEVICENAME = 32 Private Const CCHFORMNAME = 32 Private Const ENUM_CURRENT_SETTINGS = 1 Private Type DEVMODE
.........(请自己添加上）
End Type Private Declare Function ChangeDisplaySettings Lib "user32" _ Alias "ChangeDisplaySettingsA" (ByVal lpDevMode As Long, ByVal dwflags As Long) As Long Private Declare Function EnumDisplaySettings Lib "user32" Alias "EnumDisplaySettingsA" _ (ByVal lpszDeviceName As String, ByVal iModeNum As Long, lpDevMode As Any) As Long Private Declare Function GetSystemMetrics Lib "user32" (ByVal nIndex As Long) As Long Private Const SM_CXSCREEN = 0 Private Const SM_CYSCREEN = 1 Dim pNewMode As DEVMODE Dim pOldMode As Long Dim nOrgWidth As Integer, nOrgHeight As Integer
'设置显示器分辨率的执行函数 Private Function SetDisplayMode(Width As Integer, Height As Integer, Color As Integer) _ As Long ', Freq As Long) As Long
On Error GoTo ErrorHandler
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000
Const DM_BITSPERPEL = &H40000
Const DM_DISPLAYFLAGS = &H200000
Const DM_DISPLAYFREQUENCY = &H400000
With pNewMode
.dmSize = Len(pNewMode)
If Color = 0 Then 'Color = 0 时不更改屏幕颜色
.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT
.dmFields = DM_BITSPERPEL Or DM_PELSWIDTH Or DM_PELSHEIGHT
.dmPelsWidth = Width
.dmPelsHeight = Height
If Color && 0 Then
.dmBitsPerPel = Color
pOldMode = lstrcpy(pNewMode, pNewMode)
SetDisplayMode = ChangeDisplaySettings(pOldMode, 1)
Exit Function ErrorHandler:
MsgBox Err.Description End Function Private Sub Command1_Click()
Dim nWidth As Integer, nHeight As Integer, nColor As Integer
Select Case Combo1.ListIndex
nWidth = 640: nHeight = 480: nColor = 16 '640*480*16位真彩色,256色nColor _
= 8,16色nColor = 4,nColor = 0 表示不改变颜色
nWidth = 640: nHeight = 480: nColor = 24
nWidth = 640: nHeight = 480: nColor = 32
nWidth = 800: nHeight = 600: nColor = 16
nWidth = 800: nHeight = 600: nColor = 24
nWidth = 800: nHeight = 600: nColor = 32
nWidth = 1024: nHeight = 768: nColor = 16
nWidth = 1024: nHeight = 768: nColor = 24
nWidth = 1024: nHeight = 768: nColor = 32
Case other
nWidth = 800: nHeight = 600: nColor = 16
End Select
Call SetDisplayMode(nWidth, nHeight, nColor) '注意,系统不支持的显示模式不
'能选，否则准备用安全模式重启动吧. End Sub Private Sub Form_Load()
Combo1.AddItem "640*480*16位真彩色"
Combo1.AddItem "640*480*24位真彩色"
Combo1.AddItem "640*480*32位真彩色"
Combo1.AddItem "800*600*16位真彩色"
Combo1.AddItem "800*600*24位真彩色"
Combo1.AddItem "800*600*32位真彩色"
Combo1.AddItem "位真彩色"
Combo1.AddItem "位真彩色"
Combo1.AddItem "位真彩色"
Combo1.Text = Combo1.List(0)
nOrgWidth = GetDisplayWidth
nOrgHeight = GetDisplayHeight
'nOrgWidth = GetSystemMetrics(SM_CXSCREEN)'两种获取初始屏幕大小的方法均可'nOrgHeight = GetSystemMetrics(SM_CYSCREEN) End Sub Private Function GetDisplayWidth() As Integer
GetDisplayWidth = Screen.Width / Screen.TwipsPerPixelX End Function Private Function GetDisplayHeight() As Integer
GetDisplayHeight = Screen.Height / Screen.TwipsPerPixelY End Function Private Sub RestoreDisplayMode()
Call SetDisplayMode(nOrgWidth, nOrgHeight, 0) End Sub Private Sub Form_Unload(Cancel As Integer)
RestoreDisplayMode End Sub
49 各种进制转换 Function Bin2Dec(InputData As String) As Double '二进制转变成十进制 Dim DecOut As Double:Dim I As Integer:Dim LenBin As Double:Dim JOne As String LenBin = Len(InputData) '确认是否为二进制数 For I = 1 To LenBin
JOne = Mid(InputData, I, 1)
If JOne && "0" And JOne && "1" Then
MsgBox "NOT A BINARY NUMBER", vbCritical
Exit Function
End If Next I DecOut = 0 For I = Len(InputData) To 1 Step -1
If Mid(InputData, I, 1) = "1" Then
DecOut = DecOut + 2 ^ (Len(InputData) - I)
End If Next I Bin2Dec = DecOut End Function
Function Dec2Bin(InputData As Double) As String '十进制转变为二进制 Dim Quot As Double:Dim Remainder As Double:Dim BinOut As String:Dim I As Integer Dim NewVal As Double:Dim TempString As String:Dim TempVal As Double Dim BinTemp As String:Dim BinTemp1 As String:Dim PosDot As Integer Dim Temp2 As String
'检查是否为十进制的小数点 If InStr(1, CStr(InputData), ".") Then
MsgBox "Only Whole Numbers can be converted", vbCritical
GoTo eds End If BinOut = "" NewVal = InputData DoAgain: '开始计算 NewVal = (NewVal / 2) '如果有余数 If InStr(1, CStr(NewVal), ".") Then
BinOut = BinOut + "1" '得到余数
NewVal = Format(NewVal, "#0")
NewVal = (NewVal - 1)
If NewVal & 1 Then
GoTo DoneIt
End If Else
BinOut = BinOut + "0"
If NewVal & 1 Then
GoTo DoneIt
End If End If GoTo DoAgain DoneIt: BinTemp = "" '颠倒结果 For I = Len(BinOut) To 1 Step -1
BinTemp1 = Mid(BinOut, I, 1)
BinTemp = BinTemp + BinTemp1 Next I BinOut = BinTemp '输出结果 Dec2Bin = BinOut eds: End Function
Function Bin2Hex(InputData As String) As String '二进制转变成十六进制 Dim I As Integer:Dim LenBin As Integer:Dim JOne As String:Dim NumBlocks As Integer Dim FullBin As String:Dim HexOut As String:Dim TempBinBlock As String Dim TempHex As String LenBin = Len(InputData)'确认是否为二进制数 For I = 1 To LenBin
JOne = Mid(InputData, I, 1)
If JOne && "0" And JOne && "1" Then
MsgBox "NOT A BINARY NUMBER", vbCritical
Exit Function
End If Next I '设置二进制变量 FullBin = InputData ' 如果这个值的长度小于4,则补0 If LenBin & 4 Then
If LenBin = 3 Then
FullBin = "0" + FullBin
ElseIf LenBin = 2 Then
FullBin = "00" + FullBin
ElseIf LenBin = 1 Then
FullBin = "000" + FullBin
ElseIf LenBin = 0 Then
MsgBox "Nothing Given..", vbCritical
Exit Function
NumBlocks = 1
GoTo DoBlocks End If If LenBin = 4 Then
NumBlocks = 1
GoTo DoBlocks End If If LenBin & 4 Then Dim TempHold As Currency Dim TempDiv As Currency Dim AfterDot As Integer Dim Pos As Integer TempHold = Len(InputData) TempDiv = (TempHold / 4) Pos = InStr(1, CStr(TempDiv), ".") If Pos = 0 Then
NumBlocks = TempDiv
GoTo DoBlocks End If AfterDot = Mid(CStr(TempDiv), (Pos + 1)) If AfterDot = 25 Then
FullBin = "000" + FullBin
NumBlocks = (Len(FullBin) / 4) ElseIf AfterDot = 5 Then
FullBin = "00" + FullBin
NumBlocks = (Len(FullBin) / 4) ElseIf AfterDot = 75 Then
FullBin = "0" + FullBin
NumBlocks = (Len(FullBin) / 4) Else
MsgBox "Big Time Screw up happened, WAHHHHHHHHHHH", vbInformation
Exit Function End If
GoTo DoBlocks End If DoBlocks: HexOut = "" For I = 1 To Len(FullBin) Step 4
TempBinBlock = Mid(FullBin, I, 4) If TempBinBlock = "0000" Then
HexOut = HexOut + "0" ElseIf TempBinBlock = "0001" Then
HexOut = HexOut + "1" ElseIf TempBinBlock = "0010" Then
HexOut = HexOut + "2" ElseIf TempBinBlock = "0011" Then
HexOut = HexOut + "3" ElseIf TempBinBlock = "0100" Then
HexOut = HexOut + "4" ElseIf TempBinBlock = "0101" Then
HexOut = HexOut + "5" ElseIf TempBinBlock = "0110" Then
HexOut = HexOut + "6" ElseIf TempBinBlock = "0111" Then
HexOut = HexOut + "7" ElseIf TempBinBlock = "1000" Then
HexOut = HexOut + "8" ElseIf TempBinBlock = "1001" Then
HexOut = HexOut + "9" ElseIf TempBinBlock = "1010" Then
HexOut = HexOut + "A" ElseIf TempBinBlock = "1011" Then
HexOut = HexOut + "B" ElseIf TempBinBlock = "1100" Then
HexOut = HexOut + "C" ElseIf TempBinBlock = "1101" Then
HexOut = HexOut + "D" ElseIf TempBinBlock = "1110" Then
HexOut = HexOut + "E" ElseIf TempBinBlock = "1111" Then
HexOut = HexOut + "F" End If Next I Bin2Hex = HexOut eds: End Function
Function Hex2Bin(InputData As String) As String Dim I As Integer:Dim BinOut As String:Dim Lenhex As Integer InputData = UCase(InputData) Lenhex = Len(InputData) For I = 1 To Lenhex If IsNumeric(Mid(InputData, I, 1)) Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "A" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "B" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "C" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "D" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "E" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "F" Then
GoTo NumOk Else
MsgBox "Number given is not in Hex format", vbCritical
Exit Function End If NumOk: Next I BinOut = "" For I = 1 To Lenhex If Mid(InputData, I, 1) = "0" Then
BinOut = BinOut + "0000" ElseIf Mid(InputData, I, 1) = "1" Then
BinOut = BinOut + "0001" ElseIf Mid(InputData, I, 1) = "2" Then
BinOut = BinOut + "0010" ElseIf Mid(InputData, I, 1) = "3" Then
BinOut = BinOut + "0011" ElseIf Mid(InputData, I, 1) = "4" Then
BinOut = BinOut + "0100" ElseIf Mid(InputData, I, 1) = "5" Then
BinOut = BinOut + "0101" ElseIf Mid(InputData, I, 1) = "6" Then
BinOut = BinOut + "0110" ElseIf Mid(InputData, I, 1) = "7" Then
BinOut = BinOut + "0111" ElseIf Mid(InputData, I, 1) = "8" Then
BinOut = BinOut + "1000" ElseIf Mid(InputData, I, 1) = "9" Then
BinOut = BinOut + "1001" ElseIf Mid(InputData, I, 1) = "A" Then
BinOut = BinOut + "1010" ElseIf Mid(InputData, I, 1) = "B" Then BinOut = BinOut + "1011" ElseIf Mid(InputData, I, 1) = "C" Then
BinOut = BinOut + "1100" ElseIf Mid(InputData, I, 1) = "D" Then
BinOut = BinOut + "1101" ElseIf Mid(InputData, I, 1) = "E" Then
BinOut = BinOut + "1110" ElseIf Mid(InputData, I, 1) = "F" Then
BinOut = BinOut + "1111" Else
MsgBox "Something is Screwed up, Wahhhhhhhhhhh", vbCritical End If Next I Hex2Bin = BinOut eds: End Function
Function Hex2Dec(InputData As String) As Double Dim I As Integer:Dim DecOut As Double:Dim Lenhex As Integer:Dim HexStep As Double DecOut = 0 InputData = UCase(InputData) Lenhex = Len(InputData) For I = 1 To Lenhex If IsNumeric(Mid(InputData, I, 1)) Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "A" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "B" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "C" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "D" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "E" Then
GoTo NumOk ElseIf Mid(InputData, I, 1) = "F" Then
GoTo NumOk Else
MsgBox "Number given is not in Hex format", vbCritical
Exit Function End If NumOk: Next I HexStep = 0 For I = Lenhex To 1 Step -1 HexStep = HexStep * 16 If HexStep = 0 Then
HexStep = 1 End If
If Mid(InputData, I, 1) = "0" Then
DecOut = DecOut + (0 * HexStep)
ElseIf Mid(InputData, I, 1) = "1" Then
DecOut = DecOut + (1 * HexStep)
ElseIf Mid(InputData, I, 1) = "2" Then
DecOut = DecOut + (2 * HexStep)
ElseIf Mid(InputData, I, 1) = "3" Then
DecOut = DecOut + (3 * HexStep)
ElseIf Mid(InputData, I, 1) = "4" Then
DecOut = DecOut + (4 * HexStep)
ElseIf Mid(InputData, I, 1) = "5" Then
DecOut = DecOut + (5 * HexStep)
ElseIf Mid(InputData, I, 1) = "6" Then
DecOut = DecOut + (6 * HexStep)
ElseIf Mid(InputData, I, 1) = "7" Then
DecOut = DecOut + (7 * HexStep)
ElseIf Mid(InputData, I, 1) = "8" Then
DecOut = DecOut + (8 * HexStep)
ElseIf Mid(InputData, I, 1) = "9" Then
DecOut = DecOut + (9 * HexStep)
ElseIf Mid(InputData, I, 1) = "A" Then
DecOut = DecOut + (10 * HexStep)
ElseIf Mid(InputData, I, 1) = "B" Then
DecOut = DecOut + (11 * HexStep)
ElseIf Mid(InputData, I, 1) = "C" Then
DecOut = DecOut + (12 * HexStep)
ElseIf Mid(InputData, I, 1) = "D" Then
DecOut = DecOut + (13 * HexStep)
ElseIf Mid(InputData, I, 1) = "E" Then
DecOut = DecOut + (14 * HexStep)
ElseIf Mid(InputData, I, 1) = "F" Then
DecOut = DecOut + (15 * HexStep)
MsgBox "Something is Screwed up, Wahhhhhhhhhhh", vbCritical
End If Next I Hex2Dec = DecOut eds: End Function 调用方式： Private Sub cmdbin2hex_Click()
txthex.Text = Bin2Hex(txtbinary.Text) End Sub Private Sub cmddec2bin_Click() If IsNumeric(txtdec2bin.Text) Then
txtdec2bin2.Text = Dec2Bin(txtdec2bin.Text) End If End Sub Private Sub cmdDecHex_Click() If IsNumeric(txtDecimal.Text) Then
txtdechex.Text = Hex(CDbl(txtDecimal.Text)) Else
MsgBox "Not a Number.", vbCritical End If End Sub Private Sub cmdhex2bin_Click()
txtbinary2.Text = Hex2Bin(txthex2.Text) End Sub Private Sub cmdhexdec_Click()
txtdec2.Text = CStr(Hex2Dec(txthexdec.Text)) End Sub
50. 控制左右声道 Private Declare Function mciSendString Lib "winmm.dll" Alias "mciSendStringA" (ByVal _ lpstrCommand As String, ByVal lpstrReturnString As String, ByVal uReturnLength As _
Long, ByVal hwndCallback As Long) As Long Private Sub Command1_Click() PlaySound "F:/music/incubus/水木年华-再见了最爱的人.mp3" End Sub Function PlaySound(ByVal FileName As String) As Boolean
Dim cmd As String, exName As String
exName = Right(FileName, 3)
mciSendString "close " & exName, 0, 0, 0
cmd = "open " & FileName & " alias " & exName
mciSendString cmd, 0, 0, 0
PlaySound = mciSendString("play " & exName, 0, 0, 0) End Function Private Sub Command2_Click()
Static flag As Boolean ' 设置左声道开关
mciSendString "set all audio all " & IIf(flag, "on", "off"), 0, 0, 0
If flag = False Then
Command2.Caption = "左声道(关)"
Command2.Caption = "左声道(开)"
flag = Not flag End Sub Private Sub Command3_Click()
Static flag As Boolean ' 设置右声道开关
mciSendString "set all audio all " & IIf(flag, "on", "off"), 0, 0, 0
If flag = False Then
Command3.Caption = "右声道(关)"
Command3.Caption = "右声道(开)"
flag = Not flag End Sub Private Sub Command4_Click() '' 设置mp3设备音量:0--表示音量适中
mciSendString "set mp3 audio volume to 500", 0, 0, 0
看实例学VB6.0
　　一、熟悉VB 6.0的编程环境　　二、掌握VB常用控件的使用方法　　三、试着开发简单的VB应用程序--看实例学VB 6.0--认识一下VB 6.0的编程环境--　　VB6.0采用可视化的编程环境，...
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