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  4. How do I get the handle of a dialog in Visual C

How do I get the handle of a dialog in Visual C

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  • J jonsey29847

    MFC does not expose the handle to me, or does it? Thanks for fast replies!

    M Offline
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    Maximilien
    wrote on last edited by
    #9

    Well, GetSafeHwnd() returns a safe handle to the dialog window. do you need something more ?

    This signature was proudly tested on animals.

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    • M Maximilien

      Well, GetSafeHwnd() returns a safe handle to the dialog window. do you need something more ?

      This signature was proudly tested on animals.

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      jonsey29847
      wrote on last edited by
      #10

      HWND hwndDlg = GetSafeHwnd(); Is it really that simple? How does GetSafeHwnd() know which window you wish the handle of? Thanks

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      • J jonsey29847

        HWND hwndDlg = GetSafeHwnd(); Is it really that simple? How does GetSafeHwnd() know which window you wish the handle of? Thanks

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        D Offline
        David Crow
        wrote on last edited by
        #11

        jonsey29847 wrote:

        How does GetSafeHwnd() know which window you wish the handle of?

        It's called in the context of a CWnd object.

        "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

        "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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        • J jonsey29847

          So I can use existing code in an application that I developed using Win32 APIs. i.e.SendMessage(HWND, ID, wparam, lparam) MFC "Hides" this from me. However, if I am taking off in wrong direction I would appreciate some guidance here. Thanks

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          David Crow
          wrote on last edited by
          #12

          If you wanted to send a message to some edit control, you could use:

          m_edit.SendMessage(WM_GETTEXTLENGTH, 0, 0);

          or

          ::SendMessage(m_edit.GetSafeHwnd(), WM_GETTEXTLENGTH, 0, 0);

          or

          m_edit.GetWindowTextLength();

          "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

          "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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          • D David Crow

            If you wanted to send a message to some edit control, you could use:

            m_edit.SendMessage(WM_GETTEXTLENGTH, 0, 0);

            or

            ::SendMessage(m_edit.GetSafeHwnd(), WM_GETTEXTLENGTH, 0, 0);

            or

            m_edit.GetWindowTextLength();

            "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

            "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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            J Offline
            jonsey29847
            wrote on last edited by
            #13

            You have struck upon one of the problems I have using MFC. What does m_edit mean and where can I find a list of all the m_whatever? Thanks

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            • J jonsey29847

              You have struck upon one of the problems I have using MFC. What does m_edit mean and where can I find a list of all the m_whatever? Thanks

              D Offline
              D Offline
              David Crow
              wrote on last edited by
              #14

              jonsey29847 wrote:

              What does m_edit mean and where can I find a list of all the m_whatever?

              It's just an arbitrary name I chose for that code snippet. You may call it whatever you wish.

              "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

              "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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              • D David Crow

                jonsey29847 wrote:

                What does m_edit mean and where can I find a list of all the m_whatever?

                It's just an arbitrary name I chose for that code snippet. You may call it whatever you wish.

                "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

                "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

                J Offline
                J Offline
                jonsey29847
                wrote on last edited by
                #15

                Is it the name I assign using the class wizard?

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                • J jonsey29847

                  Is it the name I assign using the class wizard?

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                  D Offline
                  David Crow
                  wrote on last edited by
                  #16

                  Yes.

                  "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

                  "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

                  J 1 Reply Last reply
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                  • D David Crow

                    Yes.

                    "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

                    "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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                    J Offline
                    jonsey29847
                    wrote on last edited by
                    #17

                    Wow! I can't wait to try it. I just love this website! Thanks.

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                    • J jonsey29847

                      Hello, I am porting a Dialog based application that I used Lcc-Win32 to develop over to Visual C++. How to I get the handle of my Dialog box? Thanks in advance for your help.

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                      ali kanju
                      wrote on last edited by
                      #18

                      associate a class with dialog and use object of that class to access dialog.

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                      • J jonsey29847

                        Hello, I am porting a Dialog based application that I used Lcc-Win32 to develop over to Visual C++. How to I get the handle of my Dialog box? Thanks in advance for your help.

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                        S Offline
                        sujeet
                        wrote on last edited by
                        #19

                        In your dialog class m_hWnd varialbe will give you the handle of your dialog. You can store it as, HWND DialogHandle = m_hWnd ; Regards, Sujeet

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