vb.net怎样使窗体半透明
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窗体半透明: FormXX.Opacity=0.5或者: SetStyle(ControlStyles.SupportsTransparentBackColor, True)ControlXX.BackColor = Color.Transparent '或者是带Alpha的颜色ControlXX.BackColor = Color.FromArgb(128,Color.Red)
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参考代码：
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 GWL_EXSTYLE = (-20)
Public Const LWA_ALPHA = &H2
Public Const LWA_COLORKEY = &H1
SetLayeredWindowAttributes(Handle, 1, 0, Win32.ULW_ALPHA)
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 GWL_EXSTYLE = (-20)
Public Const LWA_ALPHA = &H2
Public Const LWA_COLORKEY = &H1
SetLayeredWindowAttributes(Handle, 1, 0, Win32.ULW_ALPHA)
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