MQCSC_* (CICS(R) information header Start Codes)

See:

MQCSC_START "Sbbb"
MQCSC_STARTDATA "SDbb"
MQCSC_TERMINPUT "TDbb"
MQCSC_NONE "bbbb"
MQCSC_START_ARRAY 'S','b','b','b'
MQCSC_STARTDATA_ARRAY 'S','D','b','b'
MQCSC_TERMINPUT_ARRAY 'T','D','b','b'
MQCSC_NONE_ARRAY 'b','b','b','b'