Character Set for TextBox

[Abra]

Hi,
I would like to allow only some pre-defined characters to be typed in a
TextBox (for example only integer numerical, or float numerical, or only
a set of letters and so on). How can this be achieved with Visual Studio
..NET 2005 (I am using C#) ? I found a PreviewKeyDown event for the
TextBox, but I dont see how to "block" the typing of certain characters.
Or is there some other way to get such a functionality ?
Thanks in advance for your help.
Abra

 

[Vipul Patel]

MaskedTextBox should help

http://msdn2.microsoft.com/en-us/library/ky2909c8(en-us,VS.80).aspx

 

[Abra]

Thanks for the hint !
Some questions about the MaskedTextControl. If I choose UInt16 as
validation type, I still can input a number bigger than 65535 without
getting an InputRejected event.
If I choose Int32 (or Int16) as validation type, I cannot input negative
sign in front of number (InputReject event is fired if '-' is entered),
so that input of negative numbers is not possible.
Is there any solution for these problems ?
Is it possible over some property to force hexadecinmal input ?
Thanks in advance.