Block redrawing, when many Entries are added or removed
Source position: MUIClass.List.pas line 111
public property TMUIList.Quiet : Boolean
If you add/remove lots of entries to/from a currently visible list, this will cause lots of screen action and slow down the operation. Setting Quiet to true will temporarily prevent the list from being refreshed, this refresh will take place only once when you set it back to false again.
List.Quiet := True; AddThousandEntries(List); List.Quiet := False;