How can my window without focus get key presses?

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  1. #1
    Reverse Engineer maxorator's Avatar
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    How can my window without focus get key presses?

    How can my window without focus get key presses?

  2. #2
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    SetFocus(hWnd)

  3. #3
    Registered User Queatrix's Avatar
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    rockytriton, that sets focus to his window, it doesn't allow his window to pick up key presses. I would suggest putting your program in a loop, using GetAsyncKeyState() to check to see if your wanted key was last pressed or is being pressed.

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    How can my window without focus get key presses?
    SetWindowsHookEx() passing WH_KEYBOARD as the hook ID. Read the MSDN documentation for the function for more information.

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    oops, sorry, I think my ADD kicked in there, I completely misread his post.

  6. #6
    Reverse Engineer maxorator's Avatar
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    How can I use the hook handle to get the key presses then? I don't know much about hooks...

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    Did you read the MSDN documentation? At the end of the remarks section, it gives an example on how to install and release hook procedures.

  8. #8
    Reverse Engineer maxorator's Avatar
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    Code:
    #include <windows.h>
    typedef struct _MYHOOKDATA 
    { 
        int nType; 
        HOOKPROC hkprc; 
        HHOOK hhook; 
    } MYHOOKDATA;
    int index;
    MYHOOKDATA myhookdata;
    MSG messages;
    LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam);
    int WINAPI WinMain(HINSTANCE hThisInstance,HINSTANCE hPrevInstance,LPSTR lpszArgument,int nFunsterStil){
        myhookdata.nType = WH_KEYBOARD; 
        myhookdata.hkprc = KeyboardProc;
            myhookdata.hhook = SetWindowsHookEx( 
            myhookdata.nType, 
            myhookdata.hkprc, 
            (HINSTANCE) NULL, GetCurrentThreadId());
        while (GetMessage (&messages, NULL, 0, 0)){
            TranslateMessage(&messages);
            DispatchMessage(&messages);
        }
        return 0;
    }
    LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) 
    { 
        CHAR szBuf[128]; 
        HDC hdc; 
        static int c = 0; 
        size_t cch; 
    	size_t * pcch;
    	HRESULT hResult;
     
        if (nCode < 0)  // do not process message 
            return CallNextHookEx(myhookdata.hhook, nCode, 
                wParam, lParam); 
        MessageBox(HWND_DESKTOP,"hello","hello",MB_OK);
        return CallNextHookEx(myhookdata.hhook, nCode, wParam, 
            lParam); 
    }
    Mixed up something awful...
    Ofcourse this doesn't work...
    Last edited by maxorator; 11-09-2005 at 12:25 PM.

  9. #9
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    First of all, your hook should be set from a DLL file...

    Do a search on this board, I posted a complete write-up on how to do this somewhere.

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