Hello I was wondering if someone could help me please?

Im trying to make a .net application however im
having a few difficulties, im basically trying to make a program which sits on my computer and listens to port 81, I can type in the IP address of my computer and through a web based form pass variables to the program on my computer, I
just want it to display these variables on another web page it
generates.. im  just having a few problems with this though and I was wondering if someone might be able to help me please? im a little stuck on the code to listen to connections on port 81 and create a webpage, im trying to find examples of doing this just simple ones however im unsure what I am looking for, so I was just hoping someone might be kind enough to advise me a little with this please

ive tried searching this site but again I dont really know what to search for... I would be so greatfull if anyone could help in anyway

Ive found something similar, however im having a few problems getting it to work under vb.net as its for an older version of VB

http://acky.net/vb/vbtcp/server.zip

Ok, it doesnt matter ive managed to struggle and do it by myself...  just having a few problems now, just showing and unloading forms... why has .net made the simplest of tasks so incredibly hard and awkward, form1.show and form1.hide doesnt seem to work at all...