Is it possible to distinguish between attachments added with drag and drop and via the attachment menu button
问题 I have an outlook add-in that handles email attachments. I have my own ribbon button to add attachments but I would like to catch attachments added via drag and drop while ignoring attachments added using the standard attachment button. It is easy enough to implement a ItemEvents_10_BeforeAttachmentAddEventHandler() but I know of no way to distinguish between attachments added with drag and drop and via the attachment menu button. Is this possible? Is it possible to handle the drag and drop