|Operating system||Microsoft Windows|
The command lists all Registry keys in HKEY CLASSES ROOT which contain the shell\open\command subkey, and prints out the REG SZ contents of the (default) value within these keys. It is an internal command built into cmd.exe; there is no
Because (default) values in HKEY_CLASSES_ROOT\<keyname>\shell\open\command contain information on how to open file types with registered extensions, this command essentially lists all registered file types, and which executables are used to open them, along with any switches used by the executable.
Multiple file extensions can be associated with the same file type and several file types can be linked to the same executable application.
- Frisch, Æleen (2001). Windows 2000 Commands Pocket Reference. O'Reilly. ISBN 978-0-596-00148-3.
- John Paul Mueller (2007). Windows Administration at the Command Line for Windows Vista, Windows 2003, Windows XP, and Windows 2000. John Wiley & Sons. ISBN 978-0470165799.
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