Capture Datagrid Delete Event

I have a datagrid in which I have a delete button - when clicks it asks the user for delete confirmation and does some other validation checks. This works fine and all is well. BUT, if a user clicks on the entire row in the datagrid they can delete the row and bypass my column style event and validation. What event can I capture or how can I disable the user from highlighting a row and hitting delete? Note: Cannot set the datagrid to readonly because the users are allowed to modify a few columns and this is for a WinForms App.

Thanks!