pub unsafe extern "system" fn CoSetProxyBlanket(
    pproxy: IUnknown,
    dwauthnsvc: u32,
    dwauthzsvc: u32,
    pserverprincname: PCWSTR,
    dwauthnlevel: RPC_C_AUTHN_LEVEL,
    dwimplevel: RPC_C_IMP_LEVEL,
    pauthinfo: *const c_void,
    dwcapabilities: u32
) -> HRESULT