C / C++ / MFC

LRESULT CALLBACK WindowProc (HWND window_handle, UINT message, WPARAM w_param, LPARAM l_param)
{
   LRESULT result (0);

   switch (message)
   {
      case WM_DESTROY:
         PostQuitMessage (0); 
         break;

      case WM_SIZE:
         {
            switch (w_param)
            {
               case SIZE_MAXIMIZED:
               case SIZE_RESTORED:
               {
                   window_width = (float)(LOWORD (l_param));
                   window_height = (float)(HIWORD (l_param));
               }
               break;
            }
         }
         break;

        case WM_INPUT:
        {		
            UINT data_size (0);
            GetRawInputData ((HRAWINPUT)l_param, RID_INPUT,NULL, &data_size, sizeof (RAWINPUTHEADER));
            
            vector<BYTE> data;
            data.resize (data_size);

            if (GetRawInputData ((HRAWINPUT)l_param, RID_INPUT, &data [0], &data_size, sizeof(RAWINPUTHEADER)) != data_size)
            {
                OutputDebugString(TEXT("GetRawInputData does not return correct size !\n")); 
                break;
            }
              
            RAWINPUT* raw = (RAWINPUT*)(&data [0]);
           
            if (raw->header.dwType == RIM_TYPEHID) 
            {
                RID_DEVICE_INFO device_info;
	       UINT info_size = sizeof(RIDI_DEVICEINFO);
	       GetRawInputDeviceInfo ( raw->header.hDevice, RIDI_DEVICEINFO, (LPVOID)&device_info, &info_size);
				   
	       if(device_info.hid.dwVendorId = 0x0457)
	       {
     	           DigitizerData* result = (DigitizerData*)(raw->data.hid.bRawData);
					
                    g_CurUsedSize = result->active_touch_count;	
				
         	           BOOL bGot = FALSE;

		  if(g_CurUsedSize <= 5)
		  {
		      if(g_PreUsedSize <  g_CurUsedSize)
		      {
		        PlaySound(TEXT("C:\\default.wav"),NULL, SND_FILENAME|SND_ASYNC );
	              }
	          }
		  bGot = TRUE;
	       }
	   }

	   if(bGot)
	   {
              g_PreUsedSize =  g_CurUsedSize;
	   }
         }				 
     }
     result = DefWindowProc (window_handle, message, w_param, l_param);
 }
         break;

      default: 
         result = DefWindowProc (window_handle, message, w_param, l_param);
         break;
   }
   return result;
}

CRecordset recordset(&database);
CString query;
// m_tabOnglet[0] is a Dialog
m_tabOnglet[0]->GetDlgItemTextW(IDC_DATETIMEPICKER1, datNaiss);
query.Format(L"SELECT numFROM personne WHERE datNais = '%s'", datNaiss);
recordset.Open(CRecordset::snapshot, query);

char preUsedSize = 0;
char curUsedSize = 0;

while(1)
{
    opening_HANDLE = TestHid.ReturnHandle();
    BOOL bGot = FALSE;
    Data64_t aData64;
    DWORD dwBytes = 0;
			

    BOOL bSus = ::ReadFile(opening_HANDLE, aData64.raw,    
                            sizeof(aData64), &dwBytes, NULL);
			
    if( bSus )
    {
        PTOUCH_REPORT inputData = (PTOUCH_REPORT)aData64.raw;
			
        curUsedSize = inputData->actualCnt;
	
        if(curUsedSize > preUsedSize)
	{
            for(int i = 0; i<(curUsedSize - preUsedSize);i++)
            {		      
                Beep(0x7fff, 500);
	    }					
       	}
	preUsedSize = curUsedSize;
					
        bGot = TRUE;		
    }
    else
    {
        CloseHandle(opening_HANDLE);       
    }
   
    if(!bGot)
    {				
     Sleep(500);
    }
}