TIWCGJQGridToolbarSearch.OnBeforeSearch Property
event which fires before a search. It is called before triggering the grid. If the event return true triggering does not occur. In this case you can construct your own search parameters and trigger the grid to search the data. Any other return value causes triggering.
published property OnBeforeSearch: TIWCGJSonFunc index 01 read GetFuncValue write SetFuncValue stored IsFuncStored;