What does the number in the AddChart2 VBA macro represent?

Question

I\'ve use my Excel 2013 to record a macro in inserting a chart, a column-clustered chart in my case. In the view code option, it shows me a line of code as below:

Answer 1

Just checking to see if 5 years later anyone has a better answer. I sure could use an enumeration of the chart styles; I don't like putting simple numbers in my code without some explanation as to what it means. Of course, I could use a comment, but if the numbers are documented, then that means they could change.