Custom multi-item context-menu entry for Windows Explorer

Question

I'm trying to create a custom context-menu entry for Windows (7) Explorer that will send ALL selected items ton ONE single command.

I've read about MultiSelectModel with a Player value in MSDN Doc but this does not seem to work. That's what I've tried:

1. under HKEY_CLASSES_ROOT/*/shell created a key "MYVERB"
   1. (Default) for 'myverb' is 'my verb'
2. under "MYVERB" created a key "COMMAND"
   1. (Default) for 'command' is 'python C:\MyScript.py "%1" "%2" "%3" "%4" "%5"'

This works fine for one item.

But when many items are selected, the script is launched one time for each of them. Instead, I want one only instance to receive all the selected items.

I tried adding a String Value "MultiSelectModel" -> "Player" both under "MYVERB" and "COMMAND" but the behaviour does not change.

Is what I'm trying to do even possible with a script and registry only? What am I doing wrong?

Answer 1

Here is an example:

HKLM\SOFTWARE\Classes\SystemFileAssociations.bmp\Shell\setdesktopwallpaper\MultiSelectModel

You don't have to specify any % parameters when you use Player, only the command itself.

You might want to try to use a script that prints the command line to a file so that you know what's happening under the hood. But I think that in this case the specification of "%1" and so on broke it...