inac ak chces mat viac rovnocennych okien pod jednym hlavnym oknom tak to sa u MS vola MDI (Multiple Document Interface) a o tom sa da kopec veci najst googlom napr.
http://www.c-sharpcorner.com/UploadFile/prasadh/MD IFormsinCSharp11292005005603AM/MDIFormsinCSharp.as px
http://www.codeproject.com/KB/cs/myBestMDI.aspx
atd...