import System, System.Windows.Forms as Forms;

Как в Zonnon Builder подключить System.Windows.Forms ?

А то система ругается:
Zonnon Compiler, Version 1.2.8.0, 7 августа 2010 г., 23:15:26
(c) 2003-2009 ETH Zurich
C:\Users\BlackBox\Documents\helloworld2.znn
[2,16] [2019] Cannot import 'System.Windows.Forms'. If it is an external name check if you have referenced the library
[4,20] [2019] Cannot import 'System.Windows.Forms.Form'. If it is an external name check if you have referenced the library