If you're developing non-blocking applications, you have to deal with events.
int ZOOM_event (int no, ZOOM_connection *cs);
The ZOOM_event executes pending events for
a number of connections. Supply the number of connections in
no and an array of connections in
cs (cs[0] ... cs[no-1]).
A pending event could be a sending a search, receiving a response,
etc.
When an event has occurred for one of the connections, this function
returns a positive integer n denoting that an event
occurred for connection cs[n-1].
When no events are pending for the connections, a value of zero is
returned.
To ensure that all outstanding requests are performed call this function
repeatedly until zero is returned.