Function SLGetReferralInformation 

pub unsafe extern "system" fn SLGetReferralInformation(
    hslc: *const c_void,
    ereferraltype: SLREFERRALTYPE,
    pskuorappid: *const GUID,
    pwszvaluename: PCWSTR,
    ppwszvalue: *mut PWSTR,
) -> HRESULT