Context Menu - Multi Selected Files - One Instance

I created an item in the context menu of Window Explorer. I hooked the exe to:

HKEY_CLASSES_ROOT\*\SHELL
HKEY_CLASSES_ROOT\Directory\shell
HKEY_CLASSES_ROOT\Folder\shell

It works fine on single files!

Only problem is when I select multiple files, it runs multiple instance of the exe hooked to that context menu.

How can I make it so that it take in all selected files as parameters but only fires off the instance only once? Similar to a software called "Beyond Compare".

Does it have to do something with the registry - Reg_Multi_SZ with %1?

try %1 %2 %3 etc

What if the number of files being selected can vary - nth?

Quote:

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Originally Posted by westconn1

try %1 %2 %3 etc

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According to this link that RobDogg provided:
http://msdn2.microsoft.com/en-us/lib...20(VS.85).aspx

%2 %3 %4 are backward compatibility for Window 3.1 for printers and other stuffs.