How adding a datapoint to a Chart control, Fastpoint type, at Run time?

In a project CRL (windows form), in a Chart control, are we able add a datapoint at run time?
Or are we liable to define all points in planning step, and then modify it  after, at run time?
I use VC++ 2010.

In practice:
I have add a Chart control. I use ChartType FastPoint.
example: I want add 200 datapoint to the Series Chart.

Must I add 200 points at planning time?

Or can I set up the datapoint characteristics in planning time and add  the 200 datapoints at run time?

beginner of planning