textbox validation - Masked TextBox Concept

This is nothing but Masked TextBox concept. Its very simple. Without validation implies that you have to implement the code. Use "if.. else" condition in accepting the ascii values of the alphabets(check for case-sensitive, if needed) and space.This will surely work for you.

You can refer the MSDN site for the Masked TextBox concept. A Masked Text Box uses a mask to distinguish between proper and improper user input. For details:

http://msdn.microsoft.com/en-us/library/system.windows.forms.maskedtextbox.aspx

- Rakesh Vikram