Enhance QMHRTVM Retrieve Option parm with *GE

The QMHRTVM (Retrieve Message) API has a so-called "Retrieve Option" parameter that controls whether the MSGID is returned or the Next MSGID is returned from the MSGF. Please add a *NEXT or *SAME option, meaning *GE (Greater Than or Equal) option that returns either the MSGID specified or if it does not exist, returns the next MSGID. Since *MSGF are just Index objects, this capability is already built into the object it just needs to be released.

When retrieving a message description using QMHRTVM, normally the need is to return the exact MSGID info specified. However often we want to iterate through the message file messages. Since no "List MSG IDs" API exists, we use QMHRTVM to produce the list. Sometimes, however, there is a need to search for a message ID from User Input and if that specific message ID exists it should be returned but if it does not exist, the next higher message ID info should be returned.
This would be the functional equivalent of calling the QMHRTVM API with *MSGID and if no message is found, calling it a 2nd time with *NEXT.
With this specific API, developers tend to have to call it twice when info other than just the MSG 1st Level text is needed. Once to determine if the message exists, but more importantly to determining the Bytes_Available so that proper malloc() (memory allocation) is performed, then call it a second time. Today I have to call it once to see if the message exists, then adjust the "Retrieve Option" to *MSGID or *NEXT, then call it again to determine the needed length, then finally call it a 3rd time to actually retrieve the msg information. Since *MSGFs are Indexs, this overhead basically eliminates any benefit of having this "fast object" used as a message file.