Solved

Getting Control ID in Message Handler

Posted on 2008-06-25
5
337 Views
Last Modified: 2013-11-18
I'm writing a plugin for windows media player in visual c++. I'm trying to work within the framework created by the wizard. I have a PropertyDialog that I wanted to add spin controls to but I'm having a difficult time trying to figure out how to work with the message and change the associated edit box controls.

So I have been able to catch messages from the spin control via the following message map:

MESSAGE_HANDLER( WM_VSCROLL, OnVScroll )


However, I have multiple spin controls and need to take different actions depending on which control the event is coming from.  So far I have the following function for the handler.

LRESULT CPropertyDialog::OnVScroll(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& fHandled)
      {
      
            int nScrollCode = (int)LOWORD(wParam);
            int nPos = (short int)HIWORD(wParam);
            SCROLLINFO si = {sizeof(SCROLLINFO),
                                    SIF_PAGE|SIF_POS|SIF_RANGE|SIF_TRACKPOS, 0, 0, 0, 0,
                                    0};

            if (nScrollCode == SB_ENDSCROLL) {
                  return 0; // Reject spurious messages
            }

}

I would like to add something like this to get the control id:

if (lParam->GetDlogCtrlID() == IDC_SPIN1)

suggestions?


Thanks,

Jason
0
Comment
Question by:cristo1701
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 17

Accepted Solution

by:
rstaveley earned 125 total points
ID: 21873420
This should do it:

GetDlgCtrlID((HWND)lParam)
0
 

Author Comment

by:cristo1701
ID: 21875054
Thanks rstaveley,

I tired this out earlier but on compilation a get the following error:
error C2660: 'ATL::CWindow::GetDlgCtrlID' : function does not take 1 arguments

It seems that this vc project setup by the Windows Media Player plugin wizard dosn't have access to many normal functions included in a standard MFC project. I think the project is setup toward producing a dll and working with COM interfaces. Do you know of a work around to or an alternative method that might be possible in my kind of vc project.

Thanks,

Jason
 
0
 

Author Comment

by:cristo1701
ID: 21875083
I spoke too soon,

It appears that i just needed to let the compiler know a little more about the symbol

The following works,

::GetDlgCtrlID((HWND)lParam)

Thanks,

Jason
0
 
LVL 17

Expert Comment

by:rstaveley
ID: 21875425
If you were wondering, the leading '::' gets it to use the global namespace, which is what you need in this case. Thanks for the points!
0
 
LVL 49

Expert Comment

by:DanRollins
ID: 21880008
Just to add a thought:
The normal way to do this is to have the ClassWizard create a control-type variable for the Spin control.  And when you look at the "Object IDs" list, you will see that control.  When you click on it, you can see notification messages that it sends.  Click on UDN_DELETAPOS and select "Add Function" and you will end up with a nice tidy little function that gets called whenever the user cspins the control.
0

Featured Post

[Webinar] Learn How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

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

Introduction: Dialogs (2) modeless dialog and a worker thread.  Handling data shared between threads.  Recursive functions. Continuing from the tenth article about sudoku.   Last article we worked with a modal dialog to help maintain informat…
I made this because I wanted to get e-mail with a attached csv file so I'd would be able to import user input into a MS Excel template, but I also wanted to register/save all inputs from each day in a file on the server. 1st - It creates a temp C…
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.
Suggested Courses

632 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