>Do you mean from one instance of VS to another (I don't otherwise know how you can show a project that is not part of the current solution)?

I have six projects opened in the Windows toolbar. So, each of them is in its own Windows application.

>If so then I don't think you can. You can drag and drop onto an open text editor window but all you get is the full file name.....

Then, something went wrong in Windows so to obtain that behavior.