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AuEvent - event union 
#include <audio/audiolib.h>
typedef union _AuEvent 
{ 
    int type;
 
    AuAnyEvent auany;
 
    AuElementNotifyEvent auelementnotify;
 
    AuMonitorNotifyEvent aumonitornotify;
 
    AuGrabNotifyEvent augrabnotify;
 
    AuErrorEvent auerror;
 
}AuEvent; 
- type
- Specifies the event type. Currently, the following
event types are defined: AuEventTypeElementNotify, AuEventTypeGrabNotify,
or AuEventTypeMonitorNotify. 
- auany
- Specifies a generic event structure containing
members common to all event types. 
- auelementnotify
- Sent to client applications
to notify them of a watermark condition or a state change. 
- aumonitornotify
- Sent
to client applications to notify them of monitor data. 
- augrabnotify
- Not Implemented.
- auerror
- Sent to client applications to notify them of non-fatal errors encountered
while processing requests. 
Events are the principal mechanism
for the server to communicate with a client application.
audiolib
- Network Audio System C Language Interface 
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