MSCHART Line graph annotation position

Im wondering if anyone could help me with annotations im using in my MShart control. I have a line chart, at certain data plots within this chart I have annotations.

RactangleAnnotation a = new RectangleA开发者_如何学Pythonnnotation();
a.AnchorDataPoint = chart.Series["series1"].Points[i];

This places the annotation on my linechart at the position the data value is. What I need is to display this annotation, possibly at the top of my chart, and draw a line from myh annotation to the dataValue.

Is this possible?

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You can get at the paint events in the Chart Control and use the DrawLine function. Here's how to get at the paint events:

http://weblogs.asp.net/stevewellens/archive/2008/12/03/custom-annotate-your-charts.aspx

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You might also want to take a look at the CalloutAnnotation. It provides a text entry area and draws an arrow to your data point. Here's an link to the sample files:

http://archive.msdn.microsoft.com/mschart/Release/ProjectReleases.aspx?ReleaseId=4418