一个自动换桌面墙纸的程序,个人认为比从网上下的要优秀.附带源码和详细说明.(简洁是我的风格,讨厌复杂的操作和无用的功能)-an automatic desktop wallpaper for the procedure, I think from the Internet than to the good. Fringe source and details. (Brevity is my style, detests complexity of the operation and useles