Gateway machines and accessing other machines on a network

Currently when I log onto win scp it takes me onto a gateway machine (A), normally when we are using these machines through something like putty we are expected to do: ssh B to log onto machine B, however I cannot find a way to do this under winscp so that I can see machine B's files. Is this possible?

It is probably possible, but I have never tried. Please search the forum, someone has posted his experiences here in past.