Custom painting within Gantt Chart Library for Windows® Forms

If you need to paint over the built in Gantt Chart drawing of GanttChartView control from Gantt Chart Library for Windows® Forms, you can do it by handling the PostPaint event referring to GanttChartArea inner control.

However, if you want to paint your drawing before the built in paint event, you will need to handle the standard Paint event of the same component, and also set ShowRowStyleBackground property of the main control to false to ensure Gantt Chart row background is not painted over your drawing.