Thanks Paul. In the Sub PopulateSourceList module, I'm getting a "Next without For" error on the "next" in Case 3. I made this "Next astyle" but it didn't help, nor did adding another "end if" above it and commenting out the "next". I'm having too much trouble following the logic to figure out how to fix this so the code runs all the way through.

Also, how do I sort the target box (listbox3) with its two columns (sort it by the file name)?