Screenshot not too easy at the moment, but if you have an WinXP pc, go to 'My Network Places' and in 'View' choose 'Details'.
Basically, those folders which are shared on the WinXP pc are shown as having a 'Network Location' of 'Local Network' even though they are on that pc, whilst folders which are shared elsewhere (ie on my pother pc's) are shown as having a 'Network Location' of 'The Internet'.
I would have thought that Local Network would have included the whole of my home network, but then again MS Speak likely uses a different terminology...
I had to mess around to get the Win& pc to share so that I could see it on my two XP pc's, but those have been happily on the network for some time.
I am likely being over cautious, but.............
"As I hurtled through space towards re-entry at twice the speed of sound the only thought in my mind was that this craft was entirely built by the lowest bidder!” Alan Shepard, Astronaut
Andrews & Arnold FTTC
DrayTek Vigor 2920Vn