How do I make a textbox that only accepts numbers?

Question

I have a windows forms app with a textbox control that I want to only accept integer values. In the past I\'ve done this kind of validation by overloading the KeyPress event

Answer 1

Take a look at Input handling in WinForm

I have posted my solution which uses the ProcessCmdKey and OnKeyPress events on the textbox. The comments show you how to use a Regex to verify the keypress and block/allow appropriately.