C++ Client for RTD Server

[manoj_solanki]

Hello,
I am trying to implement a Client (in place of Excel) to
communicate with an RTD Server in C++(VC++).The RTD Server is a COM
Automation Server running in some application and the client has to
reside on another application.
Can some one suggest me a way to talk to the server (note: the RTD
server has to make a callback (UpdateNotify()) to the client (which
implements the RTDUpdateEvent Interface)
Any help will be appreciated.
Cheers
Manoj