CCF_COM_OBJECTKEY clipboard format
The CCF_COM_OBJECTKEY clipboard format returns the object key (CLSID, GUID, or IID) for the selected node. Object keys are defined for the Application, Component, and Interface node types.
The data provided by this clipboard format is a null-terminated Unicode string. If an object key is not defined for the selected node, an empty string, L"", is the returned data.