Triggering a workflow.
I am in a situation that i need to trigger a workflow upon execution of a BAPI. I am executing BAPI_ABSENCE_REQUEST which creates a locked leave request. The creation of this leave request is suppose to trigger a workflow of mine. But for that I need to have my workflow Activated. What I am looking for is some Function Module or BAPI , which upon execution Activated my Workflow so that its in listening mode and upon execution of BAPI_ABSENCE_REQUEST , the workflow gets triggered.