You will need the professional version of Visual Basic to use this 
source code because of the 3-D effects.  This looks just like a real 
calculator with a nice indego glowing display.  It improves upon the Microsoft 
version because it also allows for keystroke entry as well as push button.  If 
your are looking to learn about SetFocus, SendKeys, and a smart usage of 
Indexing with push buttons, this is great code to look at.  Freeware and royalty 
free.   Mark Main - Twin Cities.