Good afternoon. Launched the command line (cmd.exe ) and trying to transfer it a message that the Enter key is pressed, doing this:

var
 h: hwnd;
Begin.
 Shellexecute (0, 'Open', 'Cmd.exe', '/ K', Nil, SW_SHOW);
 H: = FindWindow (0, 'C: \ Windows \ System32 \ cmd.exe');
 SendMessage (H, VK_RETURN, NIL, NIL);

Why C: \ Windows \ System32 \ Cmd.exe ? Yes, because, this is the name of the schoo window).
But this way does not want to work, maybe there are more options?

Answer 1, Authority 100%

Console applications have no window cycle, because any Send / PostMessage for them is an empty sound.
Open input / output streams via OpenProcess or CreateProcess, and transmit the Enter press symbol there.