WPF - Detecting "Drop" from source on a DragDrop operation
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I hope I will be clear enough... (please read completely)

I want to detect a "drop" operation or a "cancel drop" operation from my source application.

I do not want to detect "drop" operation or a "cancel drop" operation from the target.

I want to detect drop on source although it is a drag-drop between 2 differents processes.

How to do it the most clean way possible ?

Thanks,
Eric