TCHAR platform[255];
    SystemParametersInfo(SPI_GETPLATFORMTYPE,255,platform,NULL);
    if(StringEqual(platform, TEXT("SmartPhone")))
    {
        //SP
    }
    else if(StringEqual(platform, TEXT("PocketPC")))
    {
        //PPC
    }

static int _systemType = -1;
        /**//// <summary>
        /// 获得当前系统平台(1,SP 2,PPC 3,Undefine)
        /// </summary>
        static int SystemType
        {
            get
            {
                if (_systemType != -1) return _systemType; //-1表示未初始化

                string platform = null;
                RegistryKey keyIE_Main = null;
                try
                {
                    keyIE_Main = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Internet Explorer\Main");
                    platform = keyIE_Main.GetValue("UA-Platform", "").ToString().ToLower();
                }
                catch { }
                finally
                {
                    if (keyIE_Main != null) keyIE_Main.Close();
                }
                if (platform == null)
                {
                    //读取失败本次将不在读取，置为未定义
                    _systemType = 3;
                    return _systemType;
                }

                 
                if (platform == "smartphone")
                {
                    _systemType = 1;
                }
                else if (platform == "pocket pc")
                {
                    _systemType = 2;
                }
                else
                {
                    _systemType = 3;
                }
                return _systemType;
            }
        }