Behind the connection: Delphi uses Excel to create a chart in a PDF document

Microsoft Excel exposes all his features thru a COM interface which can easily be used from a Delphi application. In this article, I use that feature to create a 3D pie chart from data available within a Delphi program and produce a PDF document. I already talked about using Microsoft Office applications in this article. I gave examples using Word. In this article I use Excel for what it does