半透明效果

Private Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As LongPrivate Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As LongPrivate Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As LongPrivate Const WS_EX_LAYERED = &H80000Private Const GWL_EXSTYLE = (-20)Private Const LWA_ALPHA = &H2Private Const LWA_COLORKEY = &H1Private Sub Form_Load()Dim rtn As Longrtn = 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_LAYEREDSetWindowLong Me.hwnd, GWL_EXSTYLE, rtn '把新的样式赋给窗体SetLayeredWindowAttributes Me.hwnd, 0, 200, LWA_ALPHA '0-255,完全透明-不透明End Sub