Hi Tim,
About your question, blew is my suggestion.
1. Add a delete button on the OWL or even a right mouse menu
Chris: Add delete button on OWL is absolutely okay while right mouse menu is not feasible as far as i know.
2. When the delete button is selected on a row where the cursor is, it prompts a confirm, then delete if approved.
Chris: You can add one MessageBox in your eventhandler to ask user to confirm then delete.
Thanks.