The Win Forms TextBox control does not provide this functionality. But the
topic has come up quite a few times in the past. See the thread search
linked below.
http://groups.google.ca/groups?q=numeric+only+textbox+group:microsoft.public.dot
net.*&hl=en&lr=
Have you considered using the NumericUpDown control instead?

Signature
Tim Wilson
.Net Compact Framework MVP
> Visual Studio VB 7.0
>
[quoted text clipped - 3 lines]
> Thanks
> Peter