window differentianting problem

This is a discussion on window differentianting problem within the Windows Programming forums, part of the Platform Specific Boards category; Hi. I'm making a program that is initalized by a Dialogue box: Code: DialogBox(hInstance, MAKEINTRESOURCE(IDD_MAIN_DLG), hWnd, reinterpret_cast<DLGPROC>(DlgProc)); Once I receive ...

  1. #1
    TCM
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    window differentianting problem

    Hi. I'm making a program that is initalized by a Dialogue box:
    Code:
      DialogBox(hInstance, MAKEINTRESOURCE(IDD_MAIN_DLG),
                  hWnd, reinterpret_cast<DLGPROC>(DlgProc));
    Once I receive all the input from the user, I want to open another DialogBox and print the results in there.
    The problem is, once I open the new DialogBox inside of the other Dialogbox like this:
    Code:
    HWND hWndResults = GetDlgItem(hWndDlg, IDC_RESULTS);
    DialogBox(0, MAKEINTRESOURCE(IDD_RESULTS_DLG), hWndResults, reinterpret_cast<DLGPROC>(DlgProc));
    I need to be able to compare in the WM_INITDIALOG: whether this is the parent window or this is the window spawned inside the parent window (idd_results_dlg). What I eventually want to do is sprintf information into the results in real-time while the program is working. If there is a way I can make this work or an easier way to implement this, please let me know.

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    Just use SendMessage() or PostMessage() to send the data to the dialog which displays the data. This would solve your problem of displaying the results in real-time.

  3. #3
    erstwhile
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    It's more usual to use separate dialog procedures for each dialog and I'd advise you do this. This immediately eliminates the problem of dialog box identification.

    But, to answer your question of:

    >>I need to be able to compare in the WM_INITDIALOG: whether this is the parent window or this is the window spawned inside the parent window<<

    here are a couple of suggestions for how you may be able to do this:
    • Use GetDlgCtrlID to retrieve the id of the dialog box based on the handle passed to your WM_INITDIALOG handler in your dialog procedure.
    • Use DialogBoxParam to create your modal dialog boxes and use the lParam parameter to pass information to identify each dialog - this value will be passed as the lParam parameter to your WM_INITDIALOG handler.
    CProgramming FAQ
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  4. #4
    Registered User Codeplug's Avatar
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    Also, if you want the message loops of both dialogs to be running at the same time, you will have to make the second dialog box modeless or call DialogBox[Param]() in a seperate thread.

    gg

  5. #5
    TCM
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    Thanks for all of the suggestions. I tried making a second dialogue procedure, but I could not get the syntax of it correct. My compiler (C++BuilderX) kept rejecting the name of the second dialogue procedure.

  6. #6
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    Just name the two dialog procs DialogProc1 and DialogProc2. The names of the procedures shouldn't matter here.

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