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MFC Modeless Dialog Problem

Posted on 1997-12-03
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Last Modified: 2008-02-01
In the InitInstance of my app I create a modal dialog, close it, then create a modeless dialog box.  This worked when built using static mfc but when I switched the project to shared MFC and using run time library multithreaded dll, I receive an access violation in the second initdialog.  A getitem for a clistctrl is failing.
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Question by:richp
11 Comments
 
LVL 11

Expert Comment

by:alexo
ID: 1174721
The source code might help.
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Author Comment

by:richp
ID: 1174722
CCommonLogin login(m_pMainWnd,login_name,server_name);
if (login.DoModal()!=IDOK)
    return FALSE;

mktSetManager = new CMarketSetManager;
mktSetManager->Create(IDD_MARKETSET_DIALOG, m_pMainWnd);

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LVL 15

Expert Comment

by:Tommy Hui
ID: 1174723
Where in your source code did you get the access violation?
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Author Comment

by:richp
ID: 1174724
In the InitDialog of the Create(IDD_MARKETSET...
I have a CListCtrl in the dialog and a GetItem fails.
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LVL 2

Expert Comment

by:AlFa
ID: 1174725
In the InitDialog of CMarketSetManager you've to call CDialog::OnInitDialog() before triing to access a control either by a control variable or GetDlgItem.
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Author Comment

by:richp
ID: 1174726
This is already being done...

BOOL CMarketSetManager::OnInitDialog()
{
      CDialog::OnInitDialog();

.....

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LVL 2

Expert Comment

by:anichini
ID: 1174727
Where in InitInstance is the dialog code called? Are you sure that m_pMainWnd has a valid window handle at that point?
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Author Comment

by:richp
ID: 1174728
The first dialog is called after the:
      CMainFrame* pMainFrame = new CMainFrame;

      if (!pMainFrame->LoadFrame(IDR_MAINFRAME))
            return FALSE;
      m_pMainWnd = pMainFrame;

m_pMainWnd has a valid pointer after that.

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LVL 2

Expert Comment

by:AlFa
ID: 1174729
So OnInitDialog() is called before dialog is physiqualy created try to put initialisation in OnShowWindow ( with a flag to ensure one shot).

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Author Comment

by:richp
ID: 1174730
The problem was a bad text pointer and length in the GetItem.


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LVL 10

Accepted Solution

by:
RONSLOW earned 200 total points
ID: 1174731
Please remove this question now that you have answered it (can you submit you own answer?)

Alternatively, reduce the value of the question to 0 points so other experts don't waste thier time reading all this only to discover that you've answered the question yourself.

Thanks

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