How do detect a dropped email in a textbox I've created a basic Custom Task Pane in Outlook, which has a blank textbox at the moment.

I want to drag an email and drop it into the textbox. When dropped, it should show the subject of the email in the textbox.

Is that possible? If so, any pointers?

I am using VS2013 C# .NET 4.0 and Add-in is for Outlook 2010.