message loop for DialogBox?

This is a discussion on message loop for DialogBox? within the Windows Programming forums, part of the Platform Specific Boards category; is this created automatically by the DialogBox macro? is it possible to access the MSG structs for a dialog inside ...

  1. #1
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    message loop for DialogBox?

    is this created automatically by the DialogBox macro? is it possible to access the MSG structs for a dialog inside its dialog procedure (the ones that would be passed to TranslateMessage and such functions)?

  2. #2
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    In Win32 API, you can call IsDialogMessage() to check the message destination. In MFC, check out PreTranslateMessage().

    Kuphryn

  3. #3
    Yes, my avatar is stolen anonytmouse's Avatar
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    is this created automatically by the DialogBox macro?
    Yes. If you want to run your own message loop use CreateDialog() to create a modeless dialog. Remember the IsDialogMessage() call as mentioned by Kuphryn.

    is it possible to access the MSG structs for a dialog inside its dialog procedure (the ones that would be passed to TranslateMessage and such functions)?
    Not if you use DialogBox().

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    Quote Originally Posted by kuphryn
    In Win32 API, you can call IsDialogMessage() to check the message destination. In MFC, check out PreTranslateMessage().

    Kuphryn
    yea, but both of these need the MSG struct, which is what i was asking for.

    is it ok to return the result of CreateDialog in WinMain?

  5. #5
    erstwhile
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    >>is it possible to access the MSG structs<<

    Indirectly you can get the information. Consider
    Code:
    typedef struct {
        HWND hwnd;
        UINT message;
        WPARAM wParam;
        LPARAM lParam;
        DWORD time;
        POINT pt;
    } MSG, *PMSG;
    The hwnd, wParam, lParam and message are all available within your dialog procedure. For time there's GetMessageTime and for pt there's GetMessagePos.

    >>is it ok to return the result of CreateDialog in WinMain<<

    From msdn description of WinMain
    Return Value
    If the function succeeds, terminating when it receives a WM_QUIT message, it should return the exit value contained in that message's wParam parameter. If the function terminates before entering the message loop, it should return zero.
    2004 Microsoft Corporation. All rights reserved.
    edit: copyright notice included in msdn quote in accordance with 10% rule.
    Last edited by Ken Fitlike; 06-03-2004 at 01:14 PM.
    CProgramming FAQ
    Caution: this person may be a carrier of the misinformation virus.

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