controlling feature instances with a form

I have been trying to develop a form to build my part models. I cant seem to figure out how to add a value in a combobox and have it control the circular pattern instances count of a pre-built feature. Anyone able to help get me started? I can change the feature names and such. I have it doing a circular pattern around a pre-built axis called "Centerline Axis".

the feature is called "Straight Flute Pattern"

the txtbox is named "flutecountCMBBOX"

SolidworksApi macros