'窗体透明,控件不透明的代码: 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 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 GWL_EXSTYLE = (-20) Private Const LWA_ALPHA = &H2 Private Const LWA_COLORKEY = &H1
Private Sub Form_Load() Me.BackColor = &HFF0000 Dim rtn As Long Dim BorderStyler BorderStyler = 0 rtn = getwindowlong(hwnd,GWL_EXSTYLE) rtn = rtn Or WS_EX_layered SetwindowLong hwnd,GWL_EXSTYLE,rtn SetlayeredWindowAttributes hwnd,&HFF0000,LWA_COLORKEY End Sub
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‘窗体逐渐变透明: '添加一个PicturebBox,依它为容器添加一个shape,背景色设为蓝色 '添加一个时钟控件 Private Declare Function getwindowlong Lib "user32" Alias "getwindowlongA" (ByVal hwnd As Long,ByVal dwFlags As Long) As Long Const WS_EX_layered = &H80000 Const GWL_EXSTYLE = (-20) Const LWA_ALPHA = &H2 Const LWA_COLORKEY = &H1 Dim tmd As Long Private Sub Form_Load() Show Shape1.BackColor = &H80000002 Shape1.BackStyle = 1 tmd = 255 Timer1.Interval = 50 Shape1.Width = Picture1.Width SetwindowLong hwnd,WS_EX_layered SetlayeredWindowAttributes hwnd,tmd,LWA_ALPHA '越少越透明,限制0-255 End Sub Private Sub Timer1_Timer() On Error Resume Next tmd = tmd - 1 SetlayeredWindowAttributes hwnd,LWA_ALPHA Shape1.Width = Shape1.Width - Picture1.Width / 255 If tmd < 0 Then Timer1.Enabled = False MsgBox "OK!" End If End Sub
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