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.netwindows-process

Maximize another process' Window in .NET

I have a handle on another process' main window in .net (proc.MainWindowHandle). How do I maximize the window inside of .net?

Solution

  • You can pinvoke to ShowWindow with SW_SHOWMAXIMIZED to maximize the window.

    Pinvoke.net has an entry for ShowWindow here.

    For example,

    // Pinvoke declaration for ShowWindow
private const int SW_SHOWMAXIMIZED = 3;

[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

// Sample usage
ShowWindow(proc.MainWindowHandle, SW_SHOWMAXIMIZED);