Automate Organization Chart Wizard with an Excel file as the Source

[sunw1989]

I saw from Visio Code Sample Library that by using VBA, we can automate the Organization Chart Wizard to create an org chart from a Microsoft Exchange address book. I wonder where I can find a way to do the similar thing but from an Excel workbook. Has anybody got an idea? Or where is another place to find the answer?

Many thanks for your suggestions.