How to Make a Heat Map Chart - VB.NET Telerik RadChart Heatmap Project Using Gantt in Code Behind. Wednesday, October 13, 2010. In this VB.NET project, I use RadChart to create a 3x3 Heatmap using the Gantt Chart in code-behind. HeatMapVBNannetteThacker.zip. GanttChartView component displays and manages tasks and dependencies using a hierarchical data grid and an attached interactive Gantt Chart accepting drag and drop operations for scheduling task bars and creating dependency lines. Supports custom appearance settings for standard, summary, and milestone tasks for the entire chart or for individual items, as needed.