Question

I used one of the minimise to tray VC++ examples to create a program that would pop up a message at intervals to remind me to rest my eyes.

The program goes like this:

  startTime = time(0);
  g_hInstance=hInstance;

  HWND hWnd=CreateDialog(hInstance,MAKEINTRESOURCE(IDD_DIALOG1),NULL,DialogProc);
  if(hWnd)
  {
    MSG msg;
    _beginthread(&checkEyeRestTime, 0, 0);  
    while(GetMessage(&msg,hWnd,0,0))
    {
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
  }

and the checkEyeRestTime function:

void checkEyeRestTime(void* ptr)
{
    while( true )
    {
     //logic to check time and display message
    }//while

    _endthread();
}

But this program takes up 50% CPU on a two core processor. How can I reduce the load on the processor?

Answer 1

Use a timer event instead of the polling loop.