Trying to connect to R/3

Hi all,

I am trying to connect to R/3 and call an RFC.

I have included the following line of code :-

IConnectorGatewayService cgservice = PortalRuntime.getRuntimeResources().getService(IConnectorGatewayService);

But it gives a compilation error saying "IConnectorGatewayService cannot be resolved".

Can some one tell me what is the right PAR file which i need to include in my build path to avoid this problem.

It will be really helpful if some one can give me any example showing how we connect to R/3 and call an RFC.

Thanks in advance.

Regards,

Narahari