How do I GetModuleFileName() if I only have a window handle (hWnd)?

Question

I\'m trying to get the name of the executable of a window that is outside my C# 2.0 application. My app currently gets a window handle (hWnd) using the GetForegroundWindow()

Answer 1

Been struggling with the same problem for an hour now, also got the first letter replaced by a ? by using GetModuleFileNameEx. Finaly came up with this solution using the System.Diagnostics.Process class.

[DllImport("user32.dll")]
public static extern IntPtr GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId);

void GetProcessPathFromWindowHandle(IntPtr hwnd)
{
   uint pid = 0;
   Win32.GetWindowThreadProcessId(hwnd, out pid);
   Process p = Process.GetProcessById((int)pid);
   return p.MainModule.FileName;
}