Element Level Event Handlers

The event handler interfaces at the workflow element level are as follows:

Event	Description
WorkflowElement StartedEventHandler	This event occurs when the task or approval starts. For approvals, you can use this event to transition the workflow document state from Submitted to PendingApproval.
WorkflowElement CanceledEventHandler	This event occurs when the task or approval is canceled. For approvals, you can use this event to transition the workflow document state from the current state to Canceled.

WorkflowElement CompletedEvent Handler	This event occurs when the task or approval is completed. For approvals, you can use this event to transition the workflow document state from PendingApproval to Approved.
WorkflowElement ReturnedEventHandler	This event occurs when the task or approval is returned to the originator. For approvals, you can use this event to transition the workflow document state from the current state to RequestChange.
WorkflowElemChange RequestedEvent Handler	This event occurs when an approver requests a change to the task or approval. For approvals, you can use this event to transition the workflow document state from PendingApproval to RequestChange.

Best Regards,
Hossein Karimi