توسط این سورس کد می توانید رنگ صفحه نمایش را مقلوب کنید.

Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetDesktopWindow Lib "user32" () As Long
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal X As Long, ByVal Y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long

Private Sub Form_Load()
Dim DC As Long
Me.WindowState = 2
Me.AutoRedraw = True
DC = GetDC(GetDesktopWindow)
BitBlt Me.Hdc, 0, 0, Width, Height, DC, 0, 0, vbSrcInvert
End Sub

Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
End
End Sub