Passing TWinControl

I have a code unit with some routines that I am trying to import.

A few functions require me to pass a TWinControl to them.
I used the import tool to create an import unit. It seemed to generate the code correctly, but I get the following error on the functions that get the TWinControl passed to them. "Incompatible types: 'TWinControl' and 'Variant'"
Any suggestions on how to fix these functions???