文件名称：再谈VB制作不规则窗口
文件大小：30KB
文件格式：RAR
更新时间：2015-10-14 06:02:01
VB 不规则窗口
由于使用了一些新的函数，本程序必须在Windows2000下运行。 Option Explicit Public Declare Function GetObjectAPI Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long Public Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long Public Declare Function SetWindowRgn Lib "user32" (ByVal hwnd As Long, ByVal hRgn As Long, ByVal bRedraw As Boolean) As Long Public Declare Function CreateRectRgn Lib "gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long Public Declare Function CombineRgn Lib "gdi32" (ByVal hDestRgn As Long, ByVal hSrcRgn1 As Long, ByVal hSrcRgn2 As Long, ByVal nCombineMode As Long) As Long Public Const RGN_OR = 2 Public Declare Function GetBitmapBits Lib "gdi32" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long Public Declare Function SetBitmapBits Lib "gdi32" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long Public Type BITMAP bmType As Long bmWidth As Long bmHeight As Long bmWidthBytes As Long bmPlanes As Integer bmBitsPixel As Integer bmBits As Long End Type Public Const BITMAP_SIZE = 24 '=Len(BITMAP) Dim bmByte() As Byte Public Declare Function ReleaseCapture Lib "user32" () As Long Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Public Const HTCAPTION = 2 Public Const WM_NCLBUTTONDOWN = &HA1; 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 Public Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long Public Const WS_EX_LAYERED = &H80000; Public Const GWL_EXSTYLE = (-20) Public Const LWA_ALPHA = &H2; Public Const LWA_COLORKEY = &H1; Public Sub SetAutoRgn(hForm As Form, Optional transColor As Byte = vbNull) Dim X As Long, Y As Long Dim Rgn1 As Long, Rgn2 As Long Dim SPos As Long, EPos As Long Dim bm As BITMAP Dim hbm As Long Dim Wid As Long, Hgt As Long Dim xoff As Long, yoff As Long '获取窗体背景图片尺寸 hbm = hForm.Picture GetObjectAPI hbm, Len(bm), bm Wid = bm.bmWidth Hgt = bm.bmHeight With hForm .ScaleMode = vbPixels xoff = (.ScaleX(.Width, vbTwips, vbPixels) - .ScaleWidth) / 2 yoff = .ScaleY(.Height, vbTwips, vbPixels) - .ScaleHeight - xoff '改变窗体尺寸 .Width = (Wid + xoff * 2) * Screen.TwipsPerPixelX .Height = (Hgt + xoff + yoff) * Screen.TwipsPerPixelY End With ReDim bmByte(1 To Wid, 1 To Hgt) GetBitmapBits hbm, Wid * Hgt, bmByte(1, 1) '获取图像数组 '如果没有传入transColor参数，则用第一个像素作为透明色 If transColor = vbNull Then transColor = bmByte(1, 1) Rgn1 = CreateRectRgn(0, 0, 0, 0) For Y = 1 To Hgt '逐行扫描 X = 0 Do X = X + 1 While (bmByte(X, Y) = transColor) And (X < Wid) X = X + 1 '跳过是透明色的点 Wend SPos = X While (bmByte(X, Y) <> transColor) And (X < Wid) X = X + 1 '跳过不是透明色的点 Wend EPos = X - 1 '这一段是合并区域 If SPos <= EPos Then Rgn2 = CreateRectRgn(SPos - 1 + xoff, Y - 1 + yoff, EPos + xoff, Y + yoff) CombineRgn Rgn1, Rgn1, Rgn2, RGN_OR DeleteObject Rgn2 End If Loop Until X >= Wid Next Y SetWindowRgn hForm.hwnd, Rgn1, True '设定窗体形状区域 DeleteObject Rgn1 End Sub Option Explicit Private Sub Form_DblClick() Unload Me End Sub Private Sub Form_Load() 'Me.Show Dim t As Single Dim rtn As Long rtn = GetWindowLong(hwnd, GWL_EXSTYLE) rtn = rtn Or WS_EX_LAYERED SetWindowLong hwnd, GWL_EXSTYLE, rtn SetLayeredWindowAttributes hwnd, 0, 192, LWA_ALPHA '半透明 'SetLayeredWindowAttributes hwnd, &H0;, 0, LWA_COLORKEY '去除透明色 t = Timer If Me.Picture <> 0 Then Call SetAutoRgn(Me) ', 0) End If 'MsgBox "运行时间：" & Timer - t & "秒", vbInformation End Sub Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = vbLeftButton Then ReleaseCapture SendMessage Me.hwnd, WM_NCLBUTTONDOWN, HTCAPTION, 0& End If End Sub
【文件预览】：
再谈VB制作不规则窗口
----Project1.vbp(704B)
----Module1.bas(4KB)
----Form1.frm(1KB)
----Form1.frx(14KB)
----PROJECT1.VBW(84B)
----test2.gif(14KB)