The foundations for Manageability in Windows 2012/2008/2003/2000/10/8/7/Vista/XP are Windows Management Instrumentation (WMI; formerly WBEM) and WMI extensions for Windows Driver Model (WDM).
ActiveXperts Network Monitor provides the ability to build monitor check routines based on WMI. ActiveXperts has collected more than a hundred WMI samples. You can use these samples as a base for new check routines you can write yourself.
On this site, you can find many WMI samples. The samples are organizaed in groups: