Hi Martin,

Thanks for your posting!

Actually, this is a frequently asking problem. Generally, the answer is
impossible. Because the format of the .MSG file content is not documented,
when draging, the clipboard can not parse the content of the .MSG file.

For more detailed information, please check the thread below(take care of
the line-break):
http://groups-beta.google.com/group/microsoft.public.dotnet.framework.window
sforms/messages/20e2261c1a9e42ff,af5c1c8585522eb1,47a1d2b27966b72c,6fa43f9f1
0faf58d?thread_id=10ea852602100799&mode=thread&noheader=1#doc_20e2261c1a9e42
ff

So the only possible resolution for this issue is using Outlook Automation,
Outlook object model references can be found on MSDN:
http://msdn.microsoft.com/library/en-us/vbaol11/html/olconAutomatingOutlookF
romVisualBasicApplication.asp

If you have further more question on Outlook Object Model Automation, I
suggest you post the issue in Office development newsgroup, you will get
more help there.
==========================================================
Thank you for your patience and cooperation. If you have any questions or
concerns, please feel free to post it in the group. I am standing by to be
of assistance.

Best regards,
Jeffrey Tan
Microsoft Online Partner Support