Posting your original code will make it easier for someone to offer a
solution, but the suggestion below might help.

Assuming one of your cells is A1 and you're using something like Wingdings
character 252 for the tick:

If Range("A1").Value < Chr(252) Then
' your existing code here
End if


--
Ian
--

"mrwill" wrote in message
...
Hello,

I have a worksheet that has two cells in which I can double click to
either add
or remove a check mark. This code is working. I now want to add code in
which if
one box is checked, then it doesn't let you put a check mark in the other
cell.
I am new to VBA and macros. I have learned quite a bit just playing around
with
it and searching solutions online. But, this one seems to be avoiding me.
Thanks
for any help you can give.

Will