Gorancic.com » Rounded corners http://www.gorancic.com/blog Gorancic.com Blog Sun, 09 May 2010 11:25:29 +0000 http://wordpress.org/?v=2.9.1 en hourly 1 Windows Forms with Rounded Corners http://www.gorancic.com/blog/net/windows-forms-with-rounded-corners http://www.gorancic.com/blog/net/windows-forms-with-rounded-corners#comments Mon, 08 Dec 2008 07:53:24 +0000 Beno Gorancic http://www.gorancic.com/blog/?p=47 Have you ever found yourself developing a custom user interface and needed rounded corners which work on different Windows Operating Systems?

If you are using Windows Vista this is easily achieved by using a rounded PNG image with transparent corners and setting the transparency property. This however does not work on systems such as Windows XP.

The following C# code can be used to ensure you have rounded corners on a number of Windows Operating Systems.

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[DllImport("Gdi32.dll", EntryPoint = "CreateRoundRectRgn")]
private static extern IntPtr CreateRoundRectRgn
(
    int nLeftRect,      // x-coordinate of upper-left corner
    int nTopRect,       // y-coordinate of upper-left corner
    int nRightRect,     // x-coordinate of lower-right corner
    int nBottomRect,    // y-coordinate of lower-right corner
    int nWidthEllipse,  // height of ellipse
    int nHeightEllipse  // width of ellipse
);
 
// Set your own values
Region = System.Drawing.Region.FromHrgn(CreateRoundRectRgn(1, 1, 10, 10 16, 16));
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