Is the combo box from the Forms toobar, or the Controls toolbox? In either
case, you can link it to a cell, then have the VLOOKUP operate on that cell.
The two work differently, though.
If you're referring to the triangle that points downward, I don't think you
can get rid of it. It's supposed to be there. It indicates to the user
that it can be expanded. Without things to click, users go berserk. You
could change the DropButtonStyle property (if this is a combo box from the
Controls toolbox -- you never did say). But the button will still be there.