Quote Originally Posted by kevininstructor View Post
Look at making the ComboBox Draw mode DrawMode.OwnerDrawVariable and handle drawing the list manually in the DrawItem event of the ComboBox.
There is no ComboBox, he is talking about the AutoComplete list that pops up. I doubt custom drawing the TextBox would have any effect here (as the AutoComplete popup is likely a different control).

That said, I have no idea how to do what you want, yet it seems like a simple request... From half a minute of googling (I hope you did more) it doesn't seem to be possible, at least not in any simple way.

The only option I can see at this point is implementing your own AutoComplete list. Not very difficult to get the basics working, but getting it to behave exactly like a real AutoComplete list is probably complex.