Hi Parthiv,
After looking more carefully into this, and after discussing this with the development team, it turns out that this can unfortunately not be done through our API. Accessing the Distinct values of the AutofilterControl is programmed in a way that it could only be set through the AutoFilterControl host.
I apologize for my earlier reply as I have mislead you, I thought it could be done, but unfortunately, it couldn't.
Best Regards,
Michel Dahdah
Technical Support
Xceed Software inc.