XML-IXMLHTTPRequest 使用

Example:

1.The following Microsoft® JScript® example creates an XMLHTTP object and asks a server for an XML document. 
The server sends back an XML document, which is then displayed in a message box.var xmlHttpReq = new ActiveXObject("MSXML2.XMLHTTP.3.0");

xmlHttpReq.open("GET", "http://localhost/books.xml", false);
xmlHttpReq.send();
WScript.Echo(xmlHttpReq.responseText);

2.The following C/C++ example creates an XMLHTTP object and asks a server for an XML document. 
The server sends back an XML document that is displayed by the code snippet.

#import "msxml3.dll"
using namespace MSXML2;

void XMLHttpRequestSample()
{
   IXMLHTTPRequestPtr pIXMLHTTPRequest = NULL;
   BSTR bstrString = NULL;
   HRESULT hr;

   try {
      hr=pIXMLHTTPRequest.CreateInstance("Msxml2.XMLHTTP.3.0");
      SUCCEEDED(hr) ? 0 : throw hr;

      hr=pIXMLHTTPRequest->open("GET", "http://localhost/books.xml ", false);
      SUCCEEDED(hr) ? 0 : throw hr;

      hr=pIXMLHTTPRequest->send();
      SUCCEEDED(hr) ? 0 : throw hr;

      bstrString=pIXMLHTTPRequest->responseText;

      MessageBox(NULL, _bstr_t(bstrString), _T("Results"), MB_OK);

      if(bstrString)
      {
         ::SysFreeString(bstrString);
         bstrString = NULL;
      }

   } catch (...) {
      MessageBox(NULL, _T("Exception occurred"), _T("Error"), MB_OK);
      if(bstrString)
         ::SysFreeString(bstrString);
   }

}