How Can I create a TextBox with digit grouping option

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 grouping option .

example of this textbox format :

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

Have you tried anything so far? Show us some code.

hi...
i create a procedure to do this but that's very long and bore.
i know that it is possible to use FormatNumber to do this but how? i don't know

Hi,

Just use a NumericUpDown control and set the 'ThousandsSeparator' property to true

Curt