Opening multiple files in explorer with one instance of my application?

[ahcfan]

If I select multiple files in explorer and hit enter it opens each file in a separate instance of my application. What do I need to do to get all the files to be passed on the command line in only one instance of my application?

[ahcfan]

Anyone have an idea?

[duky]

You'll need to fiddle around with synchronization objects and inter-process communication to achieve what you are after.

http://msdn.microsoft.com/en-us/library/windows/desktop/ms686364
http://msdn.microsoft.com/en-us/library/windows/desktop/aa365574

http://stackoverflow.com/questions/8799646/preventing-multiple-instances-of-my-application