The subkeys and registry values associated with the HKEY_LOCAL_MACHINE\SOFTWARE\Classes key contain information about an application that is needed to support COM functionality. This information includes such topics as supported data formats, compatibility information, programmatic identifiers, DCOM, and controls.
| Subkey | Description |
|---|
| AppID | Configuration options for COM-based applications. |
| CLSID | Configuration options for COM classes. |
| <file_extension> | Associates a file name extension with a ProgID. |
| FileType | Used by GetClassFile to match patterns against various file bytes in a non-compound file. |
| Interface | Associates an interface name with an interface ID (IID). |
| <ProgID> | Identifies a class. Note that the ProgID is not guaranteed to be globally unique, unlike a CLSID. |
| <version-independent ProgID> | Used to determine the latest version of an object application. |
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Build date: 11/12/2009