This function will return one of the following operation types:
SLAPI_OPERATION_BIND
SLAPI_OPERATION_UNBIND
SLAPI_OPERATION_SEARCH
SLAPI_OPERATION_MODIFY
SLAPI_OPERATION_ADD
SLAPI_OPERATION_DELETE
SLAPI_OPERATION_MODDN
SLAPI_OPERATION_MODRDN
SLAPI_OPERATION_COMPARE
SLAPI_OPERATION_ABANDON
SLAPI_OPERATION_EXTENDED