Register WinSCP COM object in VB6

I want to convert my code to use SFTP from FTP in old VB6. To use WinSCP I need to register winscp.com object in VB6, please let me know how to do this. I know how to register dll and ocx, but regarding COM objects I have no idea.

I did some research and it seems I need to register WinSCPnet.dll in my VB6 project.
Now when I am trying to add the reference it, error is thrown as "Can't add a reference for the specified file."

Your duplicate question on Stack Overflow:
https://stackoverflow.com/q/41386517/850848