API - VBA to saveas a open XLS doc to a CSV from a macro button.

I have a VBA macro that creates and saves a Excel XLS file, it silently reopens the files performs a bunch of filters and auto fills, then re-saves it as an XLS.  Then the macro prompts the user to open it & verify the content.  I want to add an additional button in the SolidWorks macro to resave the open .XLS to .CSV (in the same location) after/if any changes are made.

SolidworksApi macros