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Returning FLT_PREOP_SUCCESS_NO_CALLBACK

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If a minifilter driver's preoperation callback routine returns FLT_PREOP_SUCCESS_NO_CALLBACK, the filter manager does not call the minifilter driver's postoperation callback routine, if one exists, during I/O completion.

If the minifilter driver's preoperation callback routine returns FLT_PREOP_SUCCESS_NO_CALLBACK, it must return NULL in its CompletionContext output parameter.

The FLT_PREOP_SUCCESS_NO_CALLBACK status value can be returned for all types of I/O operations.