I am trying to write a Program : where Client is reading Numbers from Server.

I  want to attach my Client program to HAM and if my program restarts
                   : It should be connected to the same socket connection(as -earlier) and resume from the same 
checkpoint point.

I am new at this. Can anyone help me what would be  the set of API's to call to achieve this ? or this is even possible 
or not ?

Thank you