RPG invocation

     C*..1....:....2....:....3....:....4....:....5....:....6....:....7..
     C                     CALLP     MQOPEN(HCONN : OBJDSC : OPTS :
     C                                      HOBJ : CMPCOD : REASON)

The prototype definition for the call is:

     D*..1....:....2....:....3....:....4....:....5....:....6....:....7..
     DMQOPEN           PR                  EXTPROC('MQOPEN')
     D* Connection handle
     D HCONN                         10I 0 VALUE
     D* Object descriptor
     D OBJDSC                       360A
     D* Options that control the action of MQOPEN
     D OPTS                          10I 0 VALUE
     D* Object handle
     D HOBJ                          10I 0
     D* Completion code
     D CMPCOD                        10I 0
     D* Reason code qualifying CMPCOD
     D REASON                        10I 0