idSNMP problem

could any one please explain how to use this component (TidSNMP).
I can get quicksend to work fine but I alway recieve false when running
sendquery. I have added a Mib, host, community to the Query but never
recieve anything back.

I also want to know, how would I use idsnmp to do a walk or getnext
returning the new OID as well as the value recieved.