The PolyLines Delphi library provide vector lines that can be edited during runtime. TPolyLines is a non-visual class, derived from TObject. It controls and manages all the lines (TPolyLine) The lines can be drawn on all wincontrols (TWinControl) The basic functionality: - Left click to select a line, then drag the line or a linenode. - Right click a selected line to insert a linenode. - Right click a linenode to delete it.