I am trying to make a program that will do math in the Hexadecimal system but I have no idea how to set it up to do the math in Hex.

Here's a more detailed explination of what I want to do:

The user inputs an 8-digit hexadecimal into a text field, then there are 6 buttons. By clicking 1 of the buttons, it subtracts a hexadecimal value specified by the button (ex. 4C0) from the inputed value and displays it in another text field.

Could somebody assist me in making this over AOL or something? Or be a really nice person and make the program for me? I could do some graphics for you if you wanted in exchange... anything in web design I can do...

AOL Name: Kukyfrope2
IM me if you can or want to try and help me!

Thanks!
Kuky