BufferCallback callback function
Consumers implement this function to receive statistics about each buffer of events that ETW delivers to an event trace consumer. ETW calls this function after the events for each buffer are delivered.
The PEVENT_TRACE_BUFFER_CALLBACK type defines a pointer to this callback function. BufferCallback is a placeholder for the application-defined function name.
Syntax
ULONG WINAPI BufferCallback( _In_ PEVENT_TRACE_LOGFILE Buffer );
Parameters
- Buffer [in]
-
Pointer to an EVENT_TRACE_LOGFILE structure that contains information about the buffer.
Return value
To continue processing events, return TRUE. Otherwise, return FALSE. Returning FALSE will terminate the ProcessTrace function.
Remarks
To specify the function that ETW calls to deliver the buffer statistics, set the BufferCallback member of the EVENT_TRACE_LOGFILE structure that you pass to the OpenTrace function.
Examples
For an example implementation of a BufferCallback function, see Retrieving Event Data Using MOF.
Requirements
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Minimum supported client |
Windows 2000 Professional [desktop apps only] |
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Minimum supported server |
Windows 2000 Server [desktop apps only] |
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Header |
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See also