MQWIH_* (Workload information header structure)

See:

MQWIH_STRUC_ID "WIHb"
MQWIH_STRUC_ID_ARRAY 'W','I','H','b'
MQWIH_VERSION_1 1 X'00000001'
MQWIH_CURRENT_VERSION 1 X'00000001'
MQWIH_LENGTH_1 120 X'00000078'
MQWIH_CURRENT_LENGTH 120 X'00000078'