numeric-only textbox as a control in Visual Studio toolbox

Question

I would like to make one numeric-only textbox. I\'d like to then add that same to the control toolbox within Visual Studio 2008

I\'ve already built the function to a

Answer 1

Don't reinvent the wheel. Download this:
http://www.asp.net/ajax/ajaxcontroltoolkit/Samples/NumericUpDown/NumericUpDown.aspx

EDIT:

Okay. I am getting downvoted for some three-year old advice. Currently, I would recommend looking into the contents of jQuery UI.