_mapObj = CreateFileMapping(_file, NULL, PAGE_READONLY, 0, (DWORD)length, NULL);
_map = (void*) MapViewOfFile( _mapObj, FILE_MAP_READ, 0, 0, 0 );
#else
_mapObj = CreateFileMapping(_file, NULL, PAGE_READONLY, 0, (DWORD)length, NULL);
_map = (void*) MapViewOfFile( _mapObj, FILE_MAP_READ, 0, 0, 0 );
#else