在服务中、一般程序中利用 Inet 相关函数下载数据,虽然可以使用URLDownloadFileToXXX()这个API，但是，它在使用了代理的时候会遇到麻烦。

这点，Windows 自动更新发生过这样的问题：如果使用了 IE 代理，如果下载代码位于系统帐号下，代理设置可能会失效。当然，也可以为系统帐号手动设置代理（其实就是 IE 的代理的设置方法），不过，程序会受到很多的限制。本文重写的URLDownloadFileToXXX()可不受各种限制-In services, the general procedure using Inet correlation function to download data, although you can use URLDownloadFileToXXX () This API, however, it will use a proxy when the trouble. This point, Windows automatically update occurred this question: If you use the IE proxy, if you download the code in the system account, the proxy settings may fail. Of course, you can also manually set the proxy account for the system (in fact the method of IE' s proxy settings), however, the program will be subject to many restrictions. This rewrite URLDownloadFileToXXX () are not subject to the constraints