Function AssocQueryStringByKeyA 

pub unsafe fn AssocQueryStringByKeyA<P3>(
    flags: ASSOCF,
    str: ASSOCSTR,
    hkassoc: HKEY,
    pszextra: P3,
    pszout: Option<PSTR>,
    pcchout: *mut u32,
) -> HRESULT
where
    P3: Param<PCSTR>,