Some help with C syntax please

[golem]

I'm a C novice and have come across an expression I can't get my head round in the RKM examples.

Here is an example;

/* Examine pending messages */
while ( message = (struct IntuiMessage *)GetMsg(win->UserPort) )
(

    etc.............

Its the use of the indirection operator I'm unsure of how it works in this context. Is it the same as the below in effect?

(struct IntuiMessage (*GetMsg(win->UserPort))

Help please
  :-?

[golem]

Thanks Piru - I think I've asked that before as well but something in my head fights against it. But your explanation is clear. Cheers