hi friends....
I want to create a textbox like Windows XP Calculator's textbox by this condition:

1 -the digits separate by comma (digit Grouping) like Windows XP Calculator's textbox
2 -the decimal part of number don't get digit group option .

example of this textbox format :

1,234,567.6576
0.2123423423423423
-1,2332,33.232023