crashes on some systems.. please help

This is a discussion on crashes on some systems.. please help within the Windows Programming forums, part of the Platform Specific Boards category; i've run out of ideas.. i'm working with a Tab Control and on some systems the program crashes when accessing ...

  1. #1
    Registered User
    Join Date
    Feb 2006
    Posts
    7

    crashes on some systems.. please help

    i've run out of ideas.. i'm working with a Tab Control and on some systems the program crashes when accessing a global HWND[2] for the two dialogs i use here. on my system it's all ok.

    anyone know whats wrong here?

    Code:
    HWND phDlg[2];
    
    // ...
    
    // in the dialog procedure i catch WM_INITDIALOG and initialize phDlg.
    // hwndDlg is the handle of the dialog the tab is placed on:
    
    phDlg[0] = CreateDialog(hInst, MAKEINTRESOURCE(IDD_TABDIALOG1), hwndDlg, (DLGPROC)TabDlg1Proc);
    phDlg[1] = CreateDialog(hInst, MAKEINTRESOURCE(IDD_TABDIALOG2), hwndDlg, (DLGPROC)TabDlg2Proc);
    
    // then i catch TCN_SELCHANGING and TCN_SELCHANGE and show the appropriate dialog:
    
    int nCurSel = TabCtrl_GetCurSel(hwndDlg);
    if ((nCurSel >= 0) && (nCurSel <= 1))
    	ShowWindow(phDlg[nCurSel], SW_SHOW);
    it works fine when i pass hwndDlg (from the parent window) to ShowWindow() which doesnt make sense of course but helped to localize the error. however, phDlg[0] or phDlg[1] as argument causes the app to crash - on some systems.

  2. #2
    Guest Sebastiani's Avatar
    Join Date
    Aug 2001
    Location
    Waterloo, Texas
    Posts
    5,699
    are you checking to make sure CreateDialog returned valid handles?
    Code:
    bool fun(bool value)
    {
        return std::pow(std::exp(1), std::complex<float>(0, 1) 
        * std::complex<float>(std::atan(1)*(1 << (value + 2))))
        .real() > 0;
    }

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