Yes, that was it, thanks! It's at http://archives.miloush.net/michkap/archive/2006/07/14/665714.html http://archives.miloush.net/michkap/archive/2006/07/14/6657

Yes, that was it, thanks! It's at http://archives.miloush.net/michkap/archive/2006/07/14/665714.html http://archives.miloush.net/michkap/archive/2006/07/14/66571... (Can the CP_ACP be UTF-8?) which links to http://archives.miloush.net/michkap/archive/2005/02/06/368081.html http://archives.miloush.net/michkap/archive/2005/02/06/36808... (Can a codepage be changed? How about which codepage a locale points to?) and http://archives.miloush.net/michkap/archive/2006/07/04/656051.html http://archives.miloush.net/michkap/archive/2006/07/04/65605... (Behind Norman's 'Who needs Unicode?' post). "It is not possible given both the current architecture (which must work in both user and kernel mode) and also the inherent assumption in several subsystems (like USER) that the ACPs maximum number of bytes per character is 2." And the #define would have been MB_LEN_MAX.