c++如何实现图片的下载，使用http协议！
求大神指点实现的方法及所需的类！
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是Wininet库中导出的API, 只要有相关头文件和库就可以实现.
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MFC Classes for Creating Internet Client Applications
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Overview
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How Do I

MFC provides the following classes and global functions for writing Internet client applications. Indentation indicates a class is derived from the unindented class above it. CGopherFile and CHttpFile derive from CInternetFile, for example.

Classes:

CInternetSession

CInternetConnection

CFtpConnection

CGopherConnection

CHttpConnection

CInternetFile

CGopherFile

CHttpFile

CFileFind

CFtpFileFind

CGopherFileFind

CGopherLocator

CInternetException

Global functions:

AfxParseURL

AfxGetInternetHandleType

AfxThrowInternetException

These classes and global functions are declared in AFXINET.H, except CFileFind, which is declared in AFX.H.