that is the other way around. The poster wants the tablet to be the hotspot and for example a pc connecting to it. Not vice versa.
If you read more of this users posts you will realise that there is no inherent knowledge of either tablets or Vaio’s and very little knowledge of computing in general.
My guess is that gugabackhand (plus many other user names adopted by this person over a period of time) assumed that the Tablet came with a Windows operating system as the question was very clear. Basically he/she are posting one liners in all forums which are a complete waste of time and invariably cause nothing but confusion for the OP.
Very sad but it would seem that there is little we can do about it apart from pointing out the errors as you have done...
Unfortunately, this feature isn't available natively like on most Android headsets running Android 2.x
Maybe there will be a change in the upcoming ICS firmware, because it will unify the software on tablets and phones. I've already tried some apps myself, but thos without "root permissions" don't seem to work on wifi and bluetooth. Haven't tried PDAnet which needs a client on the PC also, I'm assuming that it will work using the USB cable and maybe Bluetooth.