Listing 2: Supporting the COM error interface.

[
    coclass,
    threading("apartment"),
    support_error_info("IUltraMax"),
    vi_progid("UltraMax.UltraMax"),
    uuid("95C2D6E8-9FED-4408-B8EC-BD56CB97898B"),
]
class ATL_NO_VTABLE CUltraMax : public IUltraMax {
 ...