VB 半透明窗体代码

Ineverleft

改变150这个数字的大小可以改变透明度！范围为0到255之间。

1. Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long
   
2. Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
   
3. Private Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long
   
4. Private Const WS_EX_LAYERED = &H80000
   
5. Private Const GWL_EXSTYLE = (-20)
   
6. Private Const LWA_ALPHA = &H2
   
7. Private Const LWA_COLORKEY = &H1
   
8. Private Sub Form_Load()
   
9.     Dim rtn As Long
   
10.     rtn = GetWindowLong(hwnd, GWL_EXSTYLE)
    
11.     rtn = rtn Or WS_EX_LAYERED
    
12.     SetWindowLong hwnd, GWL_EXSTYLE, rtn
    
13.     SetLayeredWindowAttributes hwnd, 0, 150, LWA_ALPHA
    
14. End Sub
    

复制代码