I already have a couple of macros that sort a particular sheet by one of two columns.

I have them attached to buttons which replace the normal column heading in those two columns.

That works fine, but doesnt look very elegant.

How do I attach a macro to a normal column heading cell, so it doesnt look any different
to the other column headings that dont have macros attached, except with say an underline
under the text to indicate that you can sort on those columns ?

Not that easy to search for that using google etc.