These events created by TCAD, it is important for programming.
property OnActionToolToSelecting
property OnChildShapeSelected
property OnDeleteLayer
property OnMouseEnter
property OnMouseEnterShape
property OnMouseLeave
property OnMouseLeaveShape
property OnNewLayer
property OnNodeAdded
property OnNodeDeleted
property OnPaint
property OnShapeAdded
property OnShapeCodeDragging
property OnShapeCodeRotating
property OnShapeDeleted
property OnShapeMouseDragged:
property OnShapeMouseDragging
property OnShapeMouseResized
property OnShapeMouseResizing
property OnShapeMouseRotated
property OnShapeMouseRotating
property OnShapeSelected
you should read help file and read code in our demo project,then you can understand them.