C# Signature:

[DllImport("gdi32.dll")]
static extern IntPtr CreateSolidBrush(uint crColor);

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

Please call DeleteObject to free up all system resources.

Sample Code:

// Up Top

        [DllImport("user32.dll",EntryPoint="GetDC")]
        static extern IntPtr GetDC(IntPtr hWnd);

        [DllImport("gdi32.dll")]
        static extern bool FillRgn(IntPtr hdc, IntPtr hrgn, IntPtr hbr);

        [DllImport("gdi32.dll")]
        static extern IntPtr CreateRectRgn(int nLeftRect, int nTopRect, int nRightRect,
            int nBottomRect);

        [DllImport("gdi32.dll")]
        static extern IntPtr CreateSolidBrush(uint crColor);

        [DllImport("gdi32.dll")]
        static extern bool DeleteObject(IntPtr hObject);

// Then whereever:

                // 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);
                DeleteObject(brush);

Alternative Managed API:

Do you know one? Please contribute it!

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).