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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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  • L led mike

    That question confuses me. What am I missing Dave? Just curious.

    D Offline
    D Offline
    David Crow
    wrote on last edited by
    #4

    led mike wrote:

    That question confuses me.

    Mine or the OP's?

    "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

    L 1 Reply Last reply
    0
    • 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.

      M Offline
      M Offline
      Maximilien
      wrote on last edited by
      #5

      If it's your dialog, you probably have a variable assigned to it.

      YourDialog dlg;

      or

      YourDialog* pDlg;
      pDlg = new YourDialog;
      //...

      after you create the dialog (Create), you could do something like

      HWND CWnd::GetSafeHwnd( ) const;

      to get the handle to the dialog.

      This signature was proudly tested on animals.

      J 1 Reply Last reply
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      • D David Crow

        led mike wrote:

        That question confuses me.

        Mine or the OP's?

        "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

        L Offline
        L Offline
        led mike
        wrote on last edited by
        #6

        Oh, sorry, yeah yours

        1 Reply Last reply
        0
        • D David Crow

          jonsey29847 wrote:

          How to I get the handle of my Dialog box?

          For what purpose?

          "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
          #7

          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

          D 1 Reply Last reply
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          • M Maximilien

            If it's your dialog, you probably have a variable assigned to it.

            YourDialog dlg;

            or

            YourDialog* pDlg;
            pDlg = new YourDialog;
            //...

            after you create the dialog (Create), you could do something like

            HWND CWnd::GetSafeHwnd( ) const;

            to get the handle to the dialog.

            This signature was proudly tested on animals.

            J Offline
            J Offline
            jonsey29847
            wrote on last edited by
            #8

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

            M 1 Reply Last reply
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            • J jonsey29847

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

              M Offline
              M Offline
              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.

              J 1 Reply Last reply
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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.

                J Offline
                J Offline
                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

                D 1 Reply Last reply
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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

                  D Offline
                  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

                  1 Reply Last reply
                  0
                  • 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

                    D Offline
                    D Offline
                    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

                    J 1 Reply Last reply
                    0
                    • 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

                      J Offline
                      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

                      D 1 Reply Last reply
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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

                        J 1 Reply Last reply
                        0
                        • 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?

                          D 1 Reply Last reply
                          0
                          • J jonsey29847

                            Is it the name I assign using the class wizard?

                            D Offline
                            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
                            0
                            • 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

                              J Offline
                              J Offline
                              jonsey29847
                              wrote on last edited by
                              #17

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

                              1 Reply Last reply
                              0
                              • 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.

                                A Offline
                                A Offline
                                ali kanju
                                wrote on last edited by
                                #18

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

                                1 Reply Last reply
                                0
                                • 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.

                                  S Offline
                                  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

                                  1 Reply Last reply
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