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A CLSID is a globally unique identifier that identifies a COM class object. If your server or container allows linking to its embedded objects, you need to register a CLSID for each supported class of objects.
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CLSID}
| Registry key | Description |
|---|---|
| AppID | Associates an AppID with a CLSID. |
| AutoConvertTo | Specifies the automatic conversion of a given class of objects to a new class of objects. |
| AutoTreatAs | Automatically sets the CLSID for the TreatAs key to the specified value. |
| AuxUserType | Specifies an application's short display name and application names. |
| Control | Identifies an object as an ActiveX Control. |
| Conversion | Used by the Convert dialog box to determine the formats an application can read and write. |
| DataFormats | Specifies the default and main data formats supported by an application. |
| DefaultIcon | Provides default icon information for iconic presentations of objects. |
| InprocHandler | Specifies whether an application uses a custom handler. |
| InprocHandler32 | Specifies whether an application uses a custom handler. |
| InprocServer | Specifies the path to the in-process server DLL. |
| InprocServer32 | Registers a 32-bit in-process server and specifies the threading model of the apartment the server can run in. |
| Insertable | Indicates that objects of this class should appear in the Insert Object dialog box list box when used by COM container applications. |
| Interface | An optional entry that specifies all interface IDs (IIDs) supported by the associated class. |
| LocalServer | Specifies the full path to a 16-bit local server application. |
| LocalServer32 | Specifies the full path to a 32-bit local server application. |
| MiscStatus | Specifies how to create and display an object. |
| ProgID | Associates a ProgID with a CLSID. |
| ToolBoxBitmap32 | Identifies the module name and resource ID for a 16 x 16 bitmap to use for the face of a toolbar or toolbox button. |
| TreatAs | Specifies the CLSID of a class that can emulate the current class. |
| Verb | Specifies the verbs to be registered for an application. |
| Version | Specifies the version number of the control. |
| VersionIndependentProgID | Associates a ProgID with a CLSID. This value is used to determine the latest version of an object application. |
The HKEY_LOCAL_MACHINE\SOFTWARE\Classes key corresponds to the HKEY_CLASSES_ROOT key, which was retained for compatibility with earlier versions of COM.
The CLSID key contains information used by the default COM handler to return information about a class when it is in the running state.
To obtain a CLSID for your application, you can use the Uuidgen.exe, or use the CoCreateGuid function.
The CLSID is a 128-bit number, in hex, within a pair of curly braces.