Excel VB.NET How do you change the border of an individual bubble in a bubble chart?

Question

I am generating bubble charts in VB.NET and I think it would be nice to make the border of a bubble thicker, so its easier to see if there is an overlap, but I can't sort out how to do it. To do it by hand you just right click on the bubble, go to border styles and put in your value.

I sorted out how to change the color of bubbles with:

.chart.SeriesCollection(i).interior.color = RGB

I have spent quite a bit of time reading around looking for something similar that will allow me to raise the border weight a point or so, but I have had no luck.

Anyone know how to do it? Thanks as always SO!

Update: What I did:

            With oChart

            With CType(.SeriesCollection, Excel.SeriesCollection)
                .NewSeries()
                With CType(.Item(counterVal - 43), Excel.Series)
                    .Name = mainSheet.Range("a" & counterVal).Value
                    .XValues = mainSheet.Range("b" & counterVal).Value
                    .Values = mainSheet.Range("d" & counterVal).Value
                    .BubbleSizes = mainSheet.Range("c" & counterVal).Value
                    .HasDataLabels = True
                    .DataLabels.Position = XlDataLabelPosition.xlLabelPositionAbove
                    'DL.ShowSeriesName = True
                    .Has3DEffect = True
                    .Format.ThreeD.SetThreeDFormat(Microsoft.Office.Core.MsoPresetThreeDFormat.msoThreeD1)
                    '.Format.Line.Weight = 1.5
                End With
            End With
        End With

I ended up just using 3D effects instead of the line weight, but I left them both in.

Answer 1

e.g.

Dim ws As Worksheet
Dim co As ChartObject
Dim ch As Chart
Dim sr As Series
Dim pt As Point

Set ws = ActiveSheet
Set co = ws.ChartObjects(1)
Set ch = co.Chart
Set sr = ch.SeriesCollection(1)
Set pt = sr.Points(19)

pt.Select

With Selection.Format.Fill
    .Visible = msoTrue
    .ForeColor.ObjectThemeColor = msoThemeColorAccent2
    .ForeColor.TintAndShade = 0
    .ForeColor.Brightness = 0
    .Transparency = 0
    .Solid
End With
With Selection.Format.Line
    .Visible = msoTrue
    .ForeColor.RGB = RGB(0, 176, 80)
    .Transparency = 0
End With