}
	if e != nil {
		return "", newDNSError(winError("dnsquery", e), name, "")
	}
	defer syscall.DnsRecordListFree(rec, 1)

	resolved := resolveCNAME(syscall.StringToUTF16Ptr(name), rec)
	cname := windows.UTF16PtrToString(resolved)
	return absDomainName(cname), nil
}

func (r *Resolver) lookupSRV(ctx context.Context, service, proto, name string) (string, []*SRV, error) {
	if systemConf().mustUseGoResolver(r) {

		return "", e
	}
	var p *byte
	e = syscall.NetUserGetInfo(s, u, 10, &p)
	if e != nil {
		return "", e
	}
	defer syscall.NetApiBufferFree(p)
	i := (*syscall.UserInfo10)(unsafe.Pointer(p))
	return windows.UTF16PtrToString(i.FullName), nil
}

func lookupFullName(domain, username, domainAndUser string) (string, error) {
	joined, err := isDomainJoined()
	if err == nil && joined {
		name, err := lookupFullNameDomain(domainAndUser)

// proper long path handling without the need for fixups.
//
//go:linkname CanUseLongPaths
var CanUseLongPaths bool

// UTF16PtrToString is like UTF16ToString, but takes *uint16
// as a parameter instead of []uint16.
func UTF16PtrToString(p *uint16) string {
	if p == nil {
		return ""
	}
	end := unsafe.Pointer(p)
	n := 0
	for *(*uint16)(end) != 0 {

func (sid *SID) String() (string, error) {
	var s *uint16
	e := ConvertSidToStringSid(sid, &s)
	if e != nil {
		return "", e
	}
	defer LocalFree((Handle)(unsafe.Pointer(s)))
	return utf16PtrToString(s), nil
}

// Len returns the length, in bytes, of a valid security identifier sid.
func (sid *SID) Len() int {
	return int(GetLengthSid(sid))
}