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Asked: 2026-05-27T12:06:10+00:00

How can I change another program’s — let’s say Skype’s — window’s size, from

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How can I change another program’s — let’s say Skype’s — window’s size, from my C# program?

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  1. Editorial Team

    You can use MoveWindow (Where hWnd is the window you want to move):

    [DllImport("user32.dll", SetLastError = true)]
internal static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

MoveWindow(ApplicationHandle, 600, 600, 600, 600, true);

    If you don’t know the window pointer, you can use the FindWindow functionality.

    Also worth a read is MSDN SetWindowPos (Very similar to MoveWindow).

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