Has Anyone tried to use DDE through Applets

I would like to update a client side opened Excel file via the web using DDE ( Windows protocol used to cut and paste between apps ) and an applet.
I guess that the level of security of the sand-box will limit the interaction with the excel application unless the applet jar is signed and certified.
Has anyone tried to develop such application ?
I didnt go through all the DDE technology yet and I am just wondering if there are some great difficulties to overcome.
Any "difficult to find" hints are welcome
Thanks

Thanks for the hint. A good one as I did not know this link.

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