Find process id by window's handle

Question

i have a problem with getting a specific PID of a process, the problem with this process is that it's a hidden process, it's not showing on task manager / powershell, completely hidden.

what i have do far is the main window handle of this process, the question is, how can i get the pid of it.

what i'm trying to do is to read the memory of this process and edit it, but can't do so without the PID i guess (since i need to get it's base address in memory).

So, if anyone has any workaround or something for me, it will be great.

P.S: this process does not show in Process.GetProcesses().

ty!

Answer 1

You can use the following Windows API:

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

You pass in the HWND and use the out parameter to return the PID.

You can read more on this function here on MSDN.

Answer 2

You will need to use P/invoke with the Windows API.

Declare a function in your class like

 [DllImport("User32.dll")]  static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId); 

and then call it in your class.

See PInvoke.