Use connection and object handles

 

For a program to communicate with a queue manager, the program must have a unique identifier by which it knows that queue manager. This identifier is called a connection handle, sometimes referred to as an Hconn. For CICS programs, the connection handle is always zero. For all other platforms or styles of programs, the connection handle is returned by the MQCONN or MQCONNX call when the program connects to the queue manager. Programs pass the connection handle as an input parameter when they use the other calls.

For a program to work with a WebSphere MQ object, the program must have a unique identifier by which it knows that object. This identifier is called an object handle, sometimes referred to as an Hobj. The handle is returned by the MQOPEN call when the program opens the object to work with it. Programs pass the object handle as an input parameter when they use subsequent MQPUT, MQGET, MQINQ, MQSET, or MQCLOSE calls.

 

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Parameters common to all the calls

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