Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

How to set the first parameter of URLDownlofToFIle() in ATL ActiveX?

Posted on 2002-04-28
2
Medium Priority
?
574 Views
Last Modified: 2013-11-20
Hi experts,

I want to use URLDownloadToFile function in an ATL project. From MSDN, the first parameter should be "Address of the controlling IUnknown interface of the calling ActiveX component"
So, my question is how to get this IUnknown ?

codes:
STDMETHODIMP CTestATL::OnTest(IDispatch *pdisp)
{
    .....
    ::URLDownloadToFile(???,"http://www.msn.com/index.htm","C:\\1.htm",callback_function);
    .....
    return S_OK;
}
0
Comment
Question by:iProgram
2 Comments
 
LVL 12

Accepted Solution

by:
migel earned 400 total points
ID: 6974817
Hi!
You can safely pass NULL as the first parameter.
You can also get your ActiveX IUnknown pointer:
that is:

STDMETHODIMP CTestATL::OnTest(IDispatch *pdisp)
{
     CComPtr<IUnknown> punk1;
     QueryInterface(IID_IUnknown, (void**)&punk1);        ::URLDownloadToFile(punk1,"http://www.msn.com/index.htm","C:\\1.htm",callback_function);
   .....
   return S_OK;
}
0
 
LVL 1

Author Comment

by:iProgram
ID: 6974849
Yes, it works
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article, I'll describe -- and show pictures of -- some of the significant additions that have been made available to programmers in the MFC Feature Pack for Visual C++ 2008.  These same feature are in the MFC libraries that come with Visual …
In this post we will learn different types of Android Layout and some basics of an Android App.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Are you ready to place your question in front of subject-matter experts for more timely responses? With the release of Priority Question, Premium Members, Team Accounts and Qualified Experts can now identify the emergent level of their issue, signal…

824 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question