need help for bold, italic, cut, button code in VB.NET

[mines_austin]

i want whenever i click button the text of textbox become bold and again click it it become regular also for underline, italic...

also code for copy, cut, redo, undo i VB.net
please help me for it

[Hack]

Have a look here (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwindowsformstextboxbaseclasscopytopic.asp) ;)