卢昕杰：最新版Direct X官方下载

张秋华的回答：

http://www.microsoft.com/downloads/en/details.aspx?FamilyID=fd7c8a79-85df-4437-86c4-af5a5adef0d4

刘怡君的回答：

http://www.microsoft.com/downloads/en/details.aspx?FamilyID=fd7c8a79-85df-4437-86c4-af5a5adef0d4