请在声明区中放入以下声明
Const GWL_EXSTYLE = (-20)
Const WS_EX_TRANSPARENT = &H20&
Const SWP_FRAMECHANGED = &H20
Const SWP_NOMOVE = &H2
Const SWP_NOSIZE = &H1
Const SWP_SHOWME = SWP_FRAMECHANGED Or SWP_NOMOVE Or SWP_NOSIZE
Const HWND_NOTOPMOST = -2
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 SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
在 Form_Load 使用的范例如下：
Private Sub Form_Load()
SetWindowLong Me.hwnd, GWL_EXSTYLE, WS_EX_TRANSPARENT
SetWindowPos Me.hwnd, HWND_NOTOPMOST, 0&, 0&, 0&, 0&, SWP_SHOWME
Me.Refresh
End Sub
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