获取当前系统版本（3）

 //if value is 6.0, system is window vista
 else if ('6' == szAppPath[0] && '0' == szAppPath[2])
 {
  version = WINDOWS_SYSTEM_VER_VISTA32;
 }
 //if value is max than 6.0, now system is window vista
 //if value is 6.0, system is window vista
 /*<修改问题单：支持Windows7, modified   2009-05-25 begin*/
 else if (szAppPath[0] >= '6')
 /*修改问题单：支持Windows7, modified   2009-05-25 end>*/
 {
  version = WINDOWS_SYSTEM_VER_VISTA32;
 }
 else
 {
  RegCloseKey(hKey);
  return FALSE;
 }