How to filter some keys in Edit control

[Bizybs]

I need a solution to restrict my Edit Box to accept only 0 to 9 and A,B, C, D, E, F key strokes.
Please advice

[ADSOFT]

You have to SUBCLASS the edit control.


Derive a class from CEDIT , call it HEXEDIT and then create a message handle for the WM_CHAR message: use class wizard.

.... anyhow look up "SUBCLASSING CEdit" on google and I'm sure you'll figure it out!!

[bigBA]

ADSOFT is right.
but if you don't wont to do this on your own (or if you don't know how )

try this article:

http://www.codeguru.com/Cpp/controls...icle.php/c539/

good luck

[rreeaall]

It can be solved if you understand the keyborad message& character message translation

[Alin]

Originally posted by Bizybs
I need a solution to restrict my Edit Box to accept only 0 to 9 and A,B, C, D, E, F key strokes.
Please advice

see attached class.

[meisunknown]

There is another solution to this problem
do the following-

1. Add a function for the EN_UPDATE Message for the Edit Control
2. In the OnUpdate function get the character just typed say ch
3. isxdigit(ch) can be used to verify that it is a digit 0-9, A-F.

That should work.

actually I had asked the same question. read it.
thread

[Amit Sebiz]

Must keep in mind that cut, copy, paste are supported by edit box. So, you must validate the whole new text added not just last character in OnUpdate handler.

Amit