Checking file extensions on transfer

Hi,

I am using WinSCP version 4.2.4 on an XP machine.

I was wondering if there is a way to disable FTPing specific file types from local machine to the server (either by showing an error or other means). Our server has a list of unsupported file types and I am not able to find a way through WINSCP to throw an error when one of these extensions makes its way through.

Thanks,
Zig