Upload mail using Drag n Drop functionality from Outlook not Supporting

Hi All,

I am using http://mvnrepository.com/artifact/org.vectomatic/lib-gwt-file for Implementing Upload Document using Drag n Drop functionality.

It's working fine for Thunder-Bird, but I need to implement it to "Outlook" 

and it's not supporting to Outlook if i try to Upload mail by Dragging from Outlook and dropping it to Upload Text Area.

Can you guys please advise me how i can implement this ?

Thank You 

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