其实如果是单纯的下载网页，代码可以更简单，但俺这段代码不仅可以下载WEB页面，同时还可以向WEB页传递参数，完全可以替换XMLHTTP的GET功能，俺本来还想加上POST功能的，后来项目中不需要，所以就没加了，想了解WININET API的朋友，应该依此作一些扩展。-In fact, if a simple download page, the code can be more simple, but I can not download this code WEB page, but you can also pass parameters to the WEB page, can replace the XMLHTTP GET function, I had wanted to add functionality POST , then the project does not need, so I can not add, and want to know WININET API friends, so it should make some extensions.