Hi,

I have basically finished coding a workbook for my work to create
Testnumbers
for inter-office faxing authentication. Everything works fine, all the
code compiles and all the buttons and userforms display and show/do as
expected.

I can also save the book, BUT about 2 days ago , when I CLOSE/Exit the
wb Windows gives the Dreaded "This program have performed an Illegal
operation"
moan message & closes and locks Excel!

Is my code badly written? to many loops?
I tried to do things differently, here and there, but to no avail.

Is there any basic things to checkup on, for this error. Isn't Excel
suppose to
pickup any errors in your code, and avoid this?

Any help will be GREATLY appreciated...