file mask in .net

hi i wanted to use this options in vb.net how can i use it

Create TransferOptions, set TransferOptions.FileMask and pass the TransferOptions object to options argument of Session.SynchronizeDirectories method.
https://winscp.net/eng/docs/library_transferoptions
https://winscp.net/eng/docs/library_session_synchronizedirectories
https://winscp.net/eng/docs/file_mask

Some example:
https://stackoverflow.com/q/20889844/850848#20898379