NO, YOU need to learn how to read !! pauldriver did not say it was developed by citrix, but invented by citrix. Citrix invented the multiwin technology, and the ICA protocol that makes remote desktop possible. Later, MS drop the ICA protocol, and developed (with the assistance/licensing of citrix) their own RDP protocol. ICA was always much faster (thinner) than RDP, and more feature rich, but MS has really caught up with RDP over the last few years. Also, as far as I know, MS does still license mutiwin from Citrix (although this may have change in server 2008, I havent bothered to look). MultiWin is the engine that makes all this possible.
So really Mikhou, before you flame someone, and accuse them of not reading.... do your homework, and don't put words in their mouths.