interface GetClassID {

Interface GetClassID

    Sub GetClassID(ByRef pClassID As Guid)

    Sub GetClassID(ByRef pClassID As Guid)

    Sub GetClassID(ByRef pClassID As Guid)

    Sub GetClassID(ByRef pClassID As Guid)

    int GetClassID (out Guid pClassID);

The IPersistFile interface inherits its definition from IPersist, so all implementations must also include the GetClassID method of IPersist

    new void GetClassID(out Guid pClassID);

    int GetClassID (out Guid pClassID);

    int GetClassID (out Guid pClassID);

          pPersistStream.GetClassID(ref ptrClsId);