Excel 2007 VBA: Applying a gradient to a Series Collection Trendline

How do I modify this code to produce a gradient in the trendline?

Sub HideShowTrendline()
Dim trig As Range
Set trig = ActiveSheet.Shapes("Chart 1").TopLeftCell.Offset(2, 2)
If trig = 1 Then
   ActiveSheet.ChartObjects("Chart 1").Activate
   ActiveChart.SeriesCollection(5).Trendlines(1).Delete
   trig = ""
Else
   ActiveSheet.ChartObjects("Chart 1").Activate
   ActiveChart.SeriesCollection(5).Select
   ActiveChart.SeriesCollection(5).Trendlines.Add
   ActiveChart.SeriesCollection(5).Trendlines(1).Select
      With ActiveChart.SeriesCollection(5).Trendlines(1)
         .Border.Weight = xlThick
         .Border.LineStyle = xlContinuous
         .Border.ColorIndex = 17
         .Border.Weight = xlThick
         .Border.LineStyle = xlContinuous
         .Format.Shadow.Type = msoShadow22
      End With
   trig = 1
End If
[A4].Select
End Sub

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Thanks,
John
LVL 1
gabrielPennybackReliability Business Tools Analyst IIAsked:
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andrewssd3Connect With a Mentor Commented:
One way that does work is to create a custom chart template from an existing chart, then apply it to a new one.  So if you create a chart with a trendline, format the gradient on the trendline as you want, then right click on the chart and select Save as template...  Then for future charts you can start them then use VBA code similar to this to apply the chart template:
    ActiveChart.ApplyChartTemplate ( _
        "C:\Users\youruser\AppData\Roaming\Microsoft\Templates\Charts\gradient.crtx")

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BTW this is a powerful way of applying a set of standard formats to charts. The templates store colours and formats etc and allows you to get a coherent style set quickly and easily.
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andrewssd3Commented:
What do you mean?  Do you want to display the gradient on the trendline?  You can display a formula which might do what you ask, but maybe you want to change the gradient? Please be specific.
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gabrielPennybackReliability Business Tools Analyst IIAuthor Commented:
Change the "fill" of the trendline to a gradient. It's too bad they removed the ability to record shape formats in 2007, or I wouldn't even need to ask this question! :- )
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andrewssd3Commented:
Sorry - I automatically thought of the line gradient in the context of a chart!  I'm sorry I can't work out how to do this.  You can get the trendline, and I would expect to be able to do something like this:
    Dim t As Trendline
    
    Set t = ActiveChart.SeriesCollection(1).Trendlines(1)
    
    With t.Format.Fill
        .TwoColorGradient msoGradientFromCenter, 2
    End With

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but the Format.Fill does not work on a trendline, and I can't work out an alternative.  Maybe you just can't do it except through the user interface - it never records, even in Excel 2013.
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gabrielPennybackReliability Business Tools Analyst IIAuthor Commented:
Thanks, andrewssd3. I'll leave this question  open for a while just in case someone knows how to do it. I guess it's not the end of the world if I can't accomplish it!
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gabrielPennybackReliability Business Tools Analyst IIAuthor Commented:
Thanks!
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