Do an option group with three radio buttons and place a combo box next to
each radio button. On the after update event of the option group
basically make the combo box next to the radio button that is selected
visible and hide the other two. Alternatively keep them all visible and
enable/disable the combo boxes (whichever makes more sense for the
situation).

That way to the user they are picking an option of which choice they want to
make.

Radio buttons indicate that only one choice is available (checkboxes
indicate many choices are available).

HTH,
Mark Andrews
RPT Software
http://www.rptsoftware.com
http://www.donationmanagementsoftware.com

"AccessKay" wrote in message
...
Can you have three combo boxes on a search form and restrict the user to
choose only one, somewhat like an option group? How in general would you
do
this…if it is possible?

TIA,
Kay