ctrl c and ctrl v breaks a merge cell

Hi,

I am creating a input form to let users to input something and generate a flat
file.

I merged few cells that let users to input address.

But I find one loophole that users can key ctrl c and then ctrl v to break the
merge cell.

I have set the name of the merged cell to vAddress such that I get the value
by this name when generating a flat file.

Any one knows how to solve this problem . Thanks in advance.


eg_ckhad