How do I bring an unmanaged application window to front, and make it the active window for (simulated) user input

If you don’t have a handle to the window, use this before :

[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

Now assuming you have a handle to the application window :

[DllImport("user32.dll", SetLastError = true)]
static extern bool SetForegroundWindow(IntPtr hWnd);

This will make the taskbar flash if another window has keyboard focus.

If you want to force the window to come to the front, use ForceForegroundWindow (sample implementation).

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