Add a program to Open With context menu

[ahmd]

Windows XP, I believe, introduced a very useful context menu option, called, "Open With" when someone clicks on an icon of a certain kind. My question is how to add my own program into that list. (See screenshot attached)

[GCDEF]

RegisterShellFileTypes may do it. I'm not sure though.

[ahmd]

No, it doesn't do it. This function registers the document type so that I can open it with a double click, but that's not what I'm asking for.

[GCDEF]

So, just poking around in the registry under HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Explorer/FileExts you'll find a list of extensions. Under some of them you'll find OpenWithList. You could try adding an entry there.