Could someone tell me how to add check boxes "on the fly"?

I have made a form where the user enters a name then
clicks an "add" button. This enters the name into a list
on a worksheet. I want to place a checkbox beside each
name so the user can later check off names to be used in
other functions. I want the caption to be nothing "" so
that I can place the checkbox directly beside the name.
(I want the names in cells, not in the caption since there
are formulas that need the names.)

Thanks in advance for you advice.