System
Get_Property returns a Boolean value that indicates whether the Windows message WM_QUERYENDSESSION is being processed by OpenInsight. During QUERYEND processing, when Utility 'DESTROY' is called, the window will be flagged for destruction, rather then actually destroyed.
Set_Property sets or clears the QUERYEND property, allowing you to send an event to an event handler to make it behave as it would during QUERYEND processing.