MQACH_* (API exit chain area header structure)
| MQACH_STRUC_ID | ACHb |
|
| MQACH_STRUC_ID_ARRAY | 'A','C','H','b' | |
| MQACH_VERSION_1 | 1 | X'00000001' |
| MQACH_CURRENT_VERSION | 1 | X'00000001' |
| MQACH_LENGTH_1 | (value differs by platform or version) | |
| MQACH_CURRENT_LENGTH | (value differs by platform or version) |