Excel 2007: List Box (ActiveX Control) with multiple columns?

[Galley]

I am working on an electronic version of an existing paper form. The user must be able to make multiple selections from 18 choices. Each choice has a corresponding check box.

I have a List Box (ActiveX Control) with the following properties set:

ListStyle: 1 - fmListStyleOption
MultiSelect: 1 - fmMultiSelectMulti

The paper form has six columns of three items in each. I cannot figure out how to replicate this by displaying the items in multiple columns. The ColumnCount property seems to do nothing. Search results has only added to my confusion. Is this even possible? Thanks

 

[Galley]

I just wanted to add that I have used check box controls in the past, but they often results in graphical glitches during scrolling.