Hello Please try below solution procedure TMainForm.uniDBPivotGrid1AjaxEvent(Sender: TComponent; EventName: string; Params: TUniStrings); begin //Sample Response // Aparams['leftAxis'].asstring , Aparams['aggregate'].asstring, Aparams['topAxis'].asstring //leftAxis=SaleMonth //aggregate=ItemsTotal //topAxis=Customer,ShipVIA end; procedure TMainForm.UniFormCreate(Sender: TObject); begin with uniDBPivotGrid1, JSInterface do begin JSAddListener('configchange', JSFunction('m,c','