function GetMessageHandle (queuename in varchar2, itemtype in varchar2, itemkey in varchar2, actid in number, correlation in varchar2 default null) return raw;
Returns a message handle ID for a specified message.
| queuename | The name of the queue from which to retrieve the message handle. |
| itemtype | The item type of the message. |
| itemkey | The item key of the message. An item key is a string generated from the application object's primary key. The string uniquely identifies the item within an item type. The item type and key together identify the process instance. |
| actid | The function activity instance ID that this message is associated with. |
| correlation | Specify an optional correlation identifier for the message. If the correlation is null, the Workflow Engine creates a correlation identifier based on the Workflow schema name and the item type. |