win7 的桌面背景可以用定时器自动跟换，本程序是模仿win7,写给xp用户的小程序，不过在xp下只能用.bmp格式的图片作为桌面背景- The software produced by the studio in accordance with the Maple software - BY ShadowWalker win7 desktop background automatically using a timer with change, this procedure