Passing multiple filenames to program

Question

Hey guys.

I am currently writing a program that allows you to right click on any audio files you may have on your computer and select a "Create Playlist..." option. Currently I have everything working except: When I select multiple files to use in creating a playlist, my program is not opened at all. If I only select a single file, it opens just fine.

Here is the line I have in the registry.

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Winamp.File\shell\Create Playlist...\command]
@="\"C:\\Command line teset.exe\" \"%1\""


Can anyone tell me what I am doing wrong, or point me to a website that explains this topic more in depth?

Thanks,
Vivi_BlckMage