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static extern IntPtr CreateRectRgn(int nLeftRect, int nTopRect, int nRightRect, int nBottomRect);
Private Shared Function CreateRectRgn(ByVal nLeftRect As Integer, ByVal nTopRect As Integer, ByVal nRightRect As Integer, ByVal nBottomRect As Integer) As IntPtr
// This paints the current form black
IntPtr wDc = GetDC(this.Handle);
int mx = Screen.PrimaryScreen.WorkingArea.Width;
int my = Screen.PrimaryScreen.WorkingArea.Height;
IntPtr brush = CreateSolidBrush(0x0); // black, of format : //0x00bbggrr
FillRgn(wDc, CreateRectRgn(0,0,mx,my), brush);
Alternative Managed API:
No managed API. GraphicsPath can be used to create a similar functionality.
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The CreateRectRgn API
7/25/2013 7:41:33 AM - -22.214.171.124
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