Injecting commands by sending keystrokes to a command windows?

Question

I have a command prompt window that runs a web based piece of software. I want to make a program in C# that injects commands into the running command prompt window.

Any pointers?

Thanks, Paul.

Answer 1

Quick and dirty method:

use SetFocus to set the focus to the cmd window, then use SendInput to send keystrokes to the cmd window.

You can use this P/Invoke definition to call SendInput from c#:

[DllImport("user32.dll", SetLastError=true)]
static extern uint SendInput(uint nInputs, ref INPUT pInputs, int cbSize);

and this one for SetFocus

[DllImport("user32.dll")]
static extern IntPtr SetFocus(IntPtr hWnd);

In order to get the window handle that you required for SetFocus, you can use FindWindow or perhaps get the appropriate cmd process using Process.GetProcessesByName and then use the MainWindowHandle property.