Question

I have a question that I dont seem to be able to find an answer to. I am using WMI to create some timed events, and so far they are working well. The events repeat on the scheduled cycle as expected. I am now searching for a way to create a ‘one-time’ event that does not repeat and cant seem to figure it out or find an answer anywhere.

The following is an example from the MSDN website that creates a repeating event:

// Win32_LocalTime and Win32_UTCTime reside in root\cimv2 namespace. 
// Defining the EventNamespace allows the filter
// to be compiled in any namespace.
instance of __EventFilter as $FILT1
{
    Name  = "wake-up call";
    Query = "SELECT * FROM __InstanceModificationEvent WHERE "    
    "TargetInstance ISA \"Win32_LocalTime\" AND "
    "TargetInstance.Hour = 0 AND TargetInstance.Minute = 0 AND "
 "TargetInstance.Second = 0";
    QueryLanguage = "WQL";
    EventNamespace = "root\\cimv2";
};

What I would like is to make it non-repeating. Any ideas?

Cheers

The Frog

Answer 1

The __InstanceModificationEvent class is a intrinsic event which reports when a change was made to a instance of a WMI class, in this case is listening the Win32_LocalTime WMI class which return the current time. Now if you want create a non repeating event you can add the the year , month and day properties to the WQL sentece.

instance of __EventFilter as $FILT1
{
    Name  = "wake-up call";
    Query = "SELECT * FROM __InstanceModificationEvent WHERE "    
    "TargetInstance ISA \"Win32_LocalTime\" AND "
    "TargetInstance.Hour = 0 AND TargetInstance.Minute = 0 AND TargetInstance.Second = 0 AND "
    "TargetInstance.Year=2012 AND TargetInstance.Month=7 AND TargetInstance.Day=12";
    QueryLanguage = "WQL";
    EventNamespace = "root\\cimv2";
};