'IHTMLDocument2' : undeclared identifier 怎么解决

[developing_T]

我在程序里用到了 IHTMLDocument2, 但是编译的时候总提示我: 'IHTMLDocument2' : undeclared identifier
我在头文件中加入了
#include <mshtml.h>
又开始报'IHTMLDocument2' : cannot instantiate abstract class due to following members:
...

请问在VC的对话筐程序中怎么才能正常使用 IHTMLDocument2 呢

[LiuYinChina]

CComPtr<IHTMLDocument2> pDocument2;
...