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QuestionHow do I using WH_CALLWNDPROC and PT_TOUCH to get the global touch event Pin
cedricvictor24-Mar-14 4:48
cedricvictor24-Mar-14 4:48 
Dear all:

I try to use WH_CALLWNDPROC and PT_TOUCH in dll to get the global touch event. But I get some problems. My code lists as below:

C++
#pragma data_seg (".SHARED")
    HHOOK g_hPreviousMouseHook = 0;
    HINSTANCE g_hInstance = 0;
#pragma data_seg()
#pragma comment(linker, "/SECTION:.SHARED,RWS")

BOOL CSoundDllApp::InitInstance()
{
    CWinApp::InitInstance();
    g_hInstance = AfxGetInstanceHandle();
    return TRUE;
}

BOOL InstallWinHook()
{
    BOOL bReturn = TRUE;
    g_hPreviousMouseHook = SetWindowsHookEx(WH_CALLWNDPROC, 
                             &WinHookProcedure, g_hInstance, 0);

    if(NULL == g_hPreviousMouseHook)
    {
        bReturn = FALSE;
    }
    return bReturn;
}

BOOL UnInstallWinHook()
{
    BOOL bReturn = TRUE;
    if(UnhookWindowsHookEx(g_hPreviousMouseHook) == FALSE)
    {
        bReturn = FALSE;
    }
    return bReturn;
}




LRESULT CALLBACK WinHookProcedure(int nCode, WPARAM wParam, LPARAM lParam)
{
    if(0 > nCode)
        return CallNextHookEx(g_hPreviousMouseHook, nCode, 
                                         wParam, lParam);
    UINT32 pointerId = GET_POINTERID_WPARAM(wParam);  
    POINTER_INPUT_TYPE pointerType;  
    
    if(GetPointerType(pointerId, &pointerType))  
    {
    //if (pointerType == PT_TOUCH)   
    //{  
    //}  
    }
    return CallNextHookEx(g_hPreviousMouseHook, nCode, wParam,   
                                                 lParam);
}


When I disable the GetPointerType(pointerId, &pointerType) in

WinHookProcedure, it will load the dll success. When I enable the

GetPointerType(pointerId, &pointerType) in WinHookProcedure, it

will load the dll failed. what happened? Could someone tell me

please?



Thanks for your help, Victor
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