How to Check the File lock status before download

Hi ,
Thanks for providing WinSCP tool to to our SFTP process easily

and i have been using this in SSIS to download files from SFTP .

But, sometime when the file is being written by source it was being downloaded partially .
I need some tips to find out the file lock status before i download and process ONLY the files are completed
Is it possible , if yes then how

thanks In advance

It's not possible. The only way is not make sure the "source" marks the file as partial somehow. E.g. using some file extension or by writing file to a temp location, only moving it to a download directory once done.