Virtual Tables

I have a client/server problem in hand, which requires some ideas or code snippets.
This exercise is to reduce the network traffic between client and server.
One idea is to go for 3-tier architecture.. which is not feasible.
Another is to introduce a Memory cache in client side to cache some frequently used data from database. I was planning for a Virtual table structure acting as a cache.

Any ideas how to go abt... Memeory management etc...
More ideal would be if u can provide some code snippets..or pointers..

You need to use something like SQL and Win32. The C board is just for language definition questions. Try the Windows programming board, just because you might have better luck there.