Where Should I Register My Context-Menu Shell Extension to Operate on All Files and Folders?

A developer was working on a context-menu shell extension. He registered the extension under:


The developer noted that his context-menu extension was called for all files. But he also wanted his extension to be called for all directories.

If you want your context-menu shell extension to be invoked on all files and all file folders, the correct key to use for registration is HKCR\AllFileSystemObjects, not HKCR\*.

For more information, MSDN has a list of Predefined Shell Objects.


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