If your device does not have a DJP_ITEM in its job properties, then the following strategy should be implemented:

for DEVESC_QUERYSIZE return the sizeof (DJP_ITEM)
   pQuerySize->ulSizeNeeded += sizeof (DJP_ITEM);

for DEVESC_QUERYJOBPROPERTIES
    pIQuery->ulNumReturned = 0;
    pIQuery->ulValue       = DJP_NONE;
    pIQuery->lType         = DJP_ERROR_NOT_SUPPORTED;

    and return DEV_WARNING

for DEVESC_SETJOBPROPERTIES
    pISet->lType = DJP_ERROR_NOT_SUPPORTED;

    and return DEV_WARNING