How to send backspace using sendmessage(C#) to cmd.exe

Question

I am trying to send keystrokes to cmd.exe that I launch from my app. In doing so, I am able to send all the keyboard characters, but if I try to send Backspace, it doesnt seem to take effect. The following is the code snippet to send message to cmd.exe:

SendMessage((int)shell.MainWindowHandle, WM_KEYDOWN, ((int)e.KeyCode), 0);
SendMessage((int)shell.MainWindowHandle, WM_KEYUP, ((int)e.KeyCode), 0);

Any idea why this wouldnt work? What is the best way to send to the stdin of cmd.exe from a C# app?

thanks in advance

Answer 1

You will have to P/Invoke SendInput() because Backspace is processed by the keyboard driver directly.

Answer 2

use the ascii code: backspace --> OCT 0x10, char 'BS'