win32 socket http 操作

纯wininet 操作http关键代码如下：

HINTERNET hNet = ::InternetOpen(_T("Test"), INTERNET_OPEN_TYPE_DIRECT,NULL, INTERNET_INVALID_PORT_NUMBER, 0);
HINTERNET hUrlFile = ::InternetOpenUrl(hNet,_T("http://192.168.1.12/Config.txt"),NULL,  0,INTERNET_FLAG_RELOAD, 0);
  char buffer[10 * 1024];
  DWORD dwBytesRead = 0;
  BOOL bRead = ::InternetReadFile(hUrlFile,buffer,sizeof(buffer),&dwBytesRead);

:: InternetCloseHandle(hUrlFile);
:: InternetCloseHandle(hNet);