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Код

            
       hDriveC = CreateFile("\\\\.\\a:",SYNCHRONIZE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,NULL);            
        if (hDriveC == INVALID_HANDLE_VALUE)
         {
           Beep(500,2000);
         };
         
         break;
//************************************************************************************
        case WM_PAINT:
            dc = GetDC(hWnd);
            int xx,yy,pointer;
            pointer = 0;
            xx = 20;
            yy = 20;
            
            for(int x = 0; x < DrvCount ; x++)
             {//------------------------->start cycle
                 TextOut(dc,xx, yy, &NameDrive[pointer],3);
                 xx = xx + 30;
                 pointer = pointer + 4;
                  
             };//------------------------> End Cycle
            return( DefWindowProc( hWnd, messg, wParam, lParam ) ); 
         break;
//************************************************************************************         
        case WM_TIMER:
         //MessageBox(hWnd,"hh","hh",MB_OK);
         if (wParam == 3000)
           {
            Beep(1500,50);
           };
          DWORD Status = WaitForSingleObject(hDriveC,10);
          if (Status == WAIT_OBJECT_0)
            {
              Beep(300,50);
            };
          if (Status == WAIT_FAILED)
            {
              Beep(200,50);
            };
         
          //Sleep(500);
         break;