Use the Items property to access the Items collection. Use the Items collection to add, remove or change the control items. Use the GetItems method to get the items collection into a safe array. Use the PutItems method to load items from a safe array. Use the Columns property to access the control's Columns collection. Use the AddItem, InsertItem or InsertControlItem method to add new items to the control. Use the DataSource to add new columns and items to the control. Adding new items fails if the control has no columns. Use the Chart object to access all properties and methods related to the Gantt chart. Use the AddBar method to add bars to the item. The bars are always shown in the chart area. Use the PaneWidth property to specify the width of the chart.