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Send message to window

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  • C capint

    I want to send a key to a window. I used Global Hook and my code is like this : //In hook proc : if(nCode <0) CallNextHookEx(MyHook,nCode,wParam,lParam); hWndApp = CWnd::FindWindow(0,_T("Test")); if (hWndApp == NULL) MessageBox(NULL,L" Can't find the window", L"",0); hWndApp->SendMessage(WM_CHAR, 8, 0); //Backspace It can find the window but it can't send the message. Some one plz help me :rose:

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    David Crow
    wrote on last edited by
    #5

    If the target window is active, you can use SendInput().

    "Love people and use things, not love things and use people." - Unknown

    "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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    • S sudhir_Kumar

      I think you should should send: WM_KEYDOWN WM_CHAR WM_KEYUP

      -@SuDhIrKuMaR@-

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      capint
      wrote on last edited by
      #6

      What do you mean ? Do I have to send three messages at one time ?

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      • D David Crow

        If the target window is active, you can use SendInput().

        "Love people and use things, not love things and use people." - Unknown

        "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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        capint
        wrote on last edited by
        #7

        Could you show me an example of using SendInput to send a key to an active window plz ? I find it difficult to find a specific example :(

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        • C capint

          Could you show me an example of using SendInput to send a key to an active window plz ? I find it difficult to find a specific example :(

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          David Crow
          wrote on last edited by
          #8

          I found this using Google.

          "Love people and use things, not love things and use people." - Unknown

          "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

          C T 2 Replies Last reply
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          • D David Crow

            I found this using Google.

            "Love people and use things, not love things and use people." - Unknown

            "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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            capint
            wrote on last edited by
            #9

            Thank you very much :D

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            • D David Crow

              I found this using Google.

              "Love people and use things, not love things and use people." - Unknown

              "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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              ThatsAlok
              wrote on last edited by
              #10

              DavidCrow wrote:

              I found this using Google.

              he he he Answer of yahoo getting very popular

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              • D David Crow

                If the target window is active, you can use SendInput().

                "Love people and use things, not love things and use people." - Unknown

                "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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                capint
                wrote on last edited by
                #11

                Plz help me one more time. I would like to know how to send WM_KEYUP by SendInput. When I send a key, it seems to be pressed forever ...

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                • C capint

                  Plz help me one more time. I would like to know how to send WM_KEYUP by SendInput. When I send a key, it seems to be pressed forever ...

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                  David Crow
                  wrote on last edited by
                  #12

                  See here.

                  "Love people and use things, not love things and use people." - Unknown

                  "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

                  C 1 Reply Last reply
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                  • D David Crow

                    See here.

                    "Love people and use things, not love things and use people." - Unknown

                    "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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                    capint
                    wrote on last edited by
                    #13

                    I've read many pages from the pages you gave me but I still can't find the answer :( They recommend to use SendMessage but it doesn't work with SendMessage...

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                    • C capint

                      I've read many pages from the pages you gave me but I still can't find the answer :( They recommend to use SendMessage but it doesn't work with SendMessage...

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                      David Crow
                      wrote on last edited by
                      #14

                      Is the problem with sending or receiving? What does your code look like?

                      "Love people and use things, not love things and use people." - Unknown

                      "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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                      • D David Crow

                        Is the problem with sending or receiving? What does your code look like?

                        "Love people and use things, not love things and use people." - Unknown

                        "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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                        capint
                        wrote on last edited by
                        #15

                        This is my code :

                        HWND windowHandle = ::FindWindow(0, _T("Test"));
                        INPUT *key;
                        ::SetForegroundWindow(windowHandle);
                        key = new INPUT;
                        key->type = INPUT_KEYBOARD;
                        key->ki.wVk = VK_CONTROL;
                        key->ki.dwFlags = 0;
                        key->ki.time = 0;
                        key->ki.wScan = 0;
                        key->ki.dwExtraInfo = 0;
                        SendInput(1,key,sizeof(INPUT));
                        key->ki.dwExtraInfo = KEYEVENTF_KEYUP;
                        SendInput(1,key,sizeof(INPUT));

                        ::SendMessage(windowHandle,WM_KEYUP,0,0); //==> No effect ?

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                        • C capint

                          This is my code :

                          HWND windowHandle = ::FindWindow(0, _T("Test"));
                          INPUT *key;
                          ::SetForegroundWindow(windowHandle);
                          key = new INPUT;
                          key->type = INPUT_KEYBOARD;
                          key->ki.wVk = VK_CONTROL;
                          key->ki.dwFlags = 0;
                          key->ki.time = 0;
                          key->ki.wScan = 0;
                          key->ki.dwExtraInfo = 0;
                          SendInput(1,key,sizeof(INPUT));
                          key->ki.dwExtraInfo = KEYEVENTF_KEYUP;
                          SendInput(1,key,sizeof(INPUT));

                          ::SendMessage(windowHandle,WM_KEYUP,0,0); //==> No effect ?

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                          David Crow
                          wrote on last edited by
                          #16

                          capint wrote:

                          ::SendMessage(windowHandle,WM_KEYUP,0,0); //==> No effect ?

                          What does SendMessage() return?

                          "Love people and use things, not love things and use people." - Unknown

                          "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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