Bubble Chart Labels

Dear all,
I have a bubble chart in one windowsform where the size of the bubbles in the series is depending on some variables.
I'm reporting here below the code related to the chart:

Code:

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Form17.Chart1.Series("Series1").Points.AddXY(1, 2, CrossTS)
        Form17.Chart1.Series("Series1").Points.AddXY(1, 4, CrossAS)
        Form17.Chart1.Series("Series1").Points.AddXY(4, 2, CrossTD)
        Form17.Chart1.Series("Series1").Points.AddXY(4, 4, CrossAD)
        Form17.Chart1.Series("Series1").ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Bubble
        Form17.Chart1.Series("Series1").MarkerStyle = MarkerStyle.Circle
        Form17.Chart1.ChartAreas(0).AxisX.MajorGrid.LineDashStyle = ChartDashStyle.NotSet
        Form17.Chart1.ChartAreas(0).AxisY.MajorGrid.LineDashStyle = ChartDashStyle.NotSet
        Form17.Chart1.ChartAreas(0).AxisX.LabelStyle.Enabled = False
        Form17.Chart1.ChartAreas(0).AxisY.LabelStyle.Enabled = False
        Form17.Chart1.ChartAreas(0).AxisX.LineWidth = 0
        Form17.Chart1.ChartAreas(0).AxisY.LineWidth = 0
        Form17.Chart1.ChartAreas(0).AxisX.MajorTickMark.Enabled = False
        Form17.Chart1.ChartAreas(0).AxisY.MajorTickMark.Enabled = False

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Now, what I'm not able to do is to display as data labels the size of the bubble which is for me the real important data to show. I thought to differentiate the series instead of having only one and then use the statement

Code:

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Form17.Chart1.Series("SeriesX").Label = variablename

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but I was wondering whether you have any other kind of suggestion.

Thanks,
A.