How to check in C++ if the system is active?

Question

I\'m writing code that need to run only when there is no human activity on the PC, like when the screensaver is running. Any suggestions on how to do this in c++ under windows?<

Answer 1

check at this answer that looks similar.

However you need to determine exactly was "inactivity" means. That modifies the scope of your question.

Also check this code

hdesk = OpenDesktop(TEXT("Screen-saver"),
                    0,
                    FALSE,
                    DESKTOP_READOBJECTS | DESKTOP_WRITEOBJECTS);
if (hdesk)
{
   EnumDesktopWindows (hdesk, (WNDENUMPROC)KillScreenSaverFunc, 0);
   CloseDesktop (hdesk);
}

// ----------------------------------------------------------------

BOOL CALLBACK KillScreenSaverFunc (HWND hwnd, LPARAM lParam)
{
   PostMessage(hwnd, WM_CLOSE, 0, 0);
   return TRUE;
}

from here.