How to instantiate a new classe inside the function calling?

I am doing this code bellow, creating a class and send in the next line by parameter in two lines of code:

InternalMessage im(call.get_id(), CSEV_CALL_NEW);               
send_call_event(im);

I would like to do something like that using only one line, as C#:

send_call_event( new InternalMessage(call.get_id(), CSEV_CALL_NEW));

Any suggest?