WinSCP can integrate to 'send to' menu by itself. Setup application can do it. Or see "Integration" tab of preferences dialog. To tie the menu item directly to particular stored session, see "Shell icon" button on "stored sessions" tab of login dialog.
it will be great to have oportunity of copying files through 'Send To' command of
standard windows explorer File-menu.
This require better command-line syntax of winscp, something like:
winscp /session=mylinux /CopyAndQuit source=c:\file dest=~/.
Is it problem to add command line syntax to winscp ?