Alternative to GetWindowModuleFileName to get other processes ApplicationFileName?

In order to get the application name of the foreground Window (or the name of application file) I want to use GetActiveWindow with G开发者_开发问答etWindowModuleFileName.

I found a similar question relating to GetWindowText here

That implementation of GetWindowText works fine, but GetWindowModuleFileName only returns a value for visual studio (when I click inside the devenv) for all other applications it stays blank.

Any hint how I can find out what goes wrong? Might this have to do with permission/security of my application querying the applicationfilename of another process?

EDIT: http://support.microsoft.com/?id=228469 looks like this doesn't work under Win >=XP

Any alternatives how to get the application file name?

In order to get the application name of the foreground Window (or the name of application file) I want to use GetActiveWindow with GetWindowModuleFileName.

... querying the applicationfilename of another process ...

In my opinion your problem with use of GetActiveWindow() function. It is used for gathering information from the calling thread/process only. If calling thread is inactive GetActiveWindow return 0;

From MSDN:

GetActiveWindow Retrieves the window handle to the active window attached to the calling thread's message queue.

Try to use GetForegroundWindow() function instead of GetActiveWindow()

By chance do you have UAC turned off?

Starting with Vista, if your code touches an HWND in another process, your process needs to be run at the same privilege level.

In other words, if the window is hosted in a process running as administrator, your app must also run as administrator.

I found a workaround using this:

[DllImport("user32.dll", SetLastError = true)]
static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);

IntPtr handle = IntPtr.Zero;
handle = GetForegroundWindow();

uint processId;
if (GetWindowThreadProcessId(handle, out processId) > 0)
{
    Console.WriteLine(Process.GetProcessById((int)processId).MainModule.FileName);
}