[python-win32] Using DDE to launch a file in an existing window

[Matt Harriger]

Hello all,

I have a question about using DDE to launch a file in an existing
application when double-clicked from explorer. I'm trying to use the
built-in windows functionality for doing this by setting the application and
topic keys in HKCR\my_file_type\shell\open\ddeexec. I also have
HKCR\my_file_type\shell\open\command set up to launch my python script if
windows can't find the application through dde ( i.e. it's not currently
running). The python script create a server and registers the system topic
as the very first thing it does. When I double-click a file of this type in
Explorer, I get an error dialog saying that "windows cannot find '
filename.ext' Make sure you typed the name correctly...". Has anyone else
been able to open a file in a running application this way?

Thanks,

--Matt
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