Window Custom Property Query Status


I have some custom properties in a window that are SQL queries. These custom properties drive some charts on the screen. There are a couple properties on the window (such as start/end dates) that are included in the custom property and when changes cause the queries to refresh. I’ve noticed that a query can take a while and it is not obvious if the charts are showing data for the previous or the current set of user properties. My question to the group is if anyone is aware of a way to know that a property query tag is updating so I can either display an “updating” message or hide the charts or something while the query is running?