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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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  • 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

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    • 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

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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.

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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

              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

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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

                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
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                      • 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.

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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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                            A Offline
                            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.

                              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

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