Robert Reif wrote: >+static const WELLKNOWNSID WellKnownSids[] = >+{ >+ { {' ',' '}, WinNullSid, SID_REVISION, 1, { SECURITY_NULL_SID_AUTHORITY }, { SECURITY_NULL_RID } }, > > Two spaces isn't a very good way of making the entry not be parsed by ParseStringSidToSid. Might I suggest using two nuls instead? -- Rob Shearman