[NumLock]

ну вот как раз НЕ для Delphi:

TightVNC is a free remote control software package. With TightVNC, you can see the desktop of a remote machine and control it with your local mouse and keyboard, just like you would do it sitting in the front of that computer.

download
TightVNC Server, source code in a ZIP archive
download
TightVNC Viewer, source code in a ZIP archive
http://www.tightvnc.com/