Public Property NegativeBorderColor As Color

Dim instance As DatabarConditionalFormattingRule
Dim value As Color
 
instance.NegativeBorderColor = value
 
value = instance.NegativeBorderColor

public Color NegativeBorderColor {get; set;}

private void Form1_Load(object sender, EventArgs e)
{
    fpSpread1.Sheets[0].Cells[0, 0].Value = 3;
    fpSpread1.Sheets[0].Cells[1, 0].Value = -2;
    fpSpread1.Sheets[0].Cells[1, 1].Value = 10;
    fpSpread1.Sheets[0].Cells[0, 2].Value = 1;   
}

private void button1_Click(object sender, EventArgs e)
{
    FarPoint.Win.Spread.DatabarConditionalFormattingRule d = new FarPoint.Win.Spread.DatabarConditionalFormattingRule();
    d.ShowBorder = true;
    d.AxisColor = System.Drawing.Color.DarkOrange;
    d.UseNegativeBorderColor = true;    
    d.NegativeBorderColor = System.Drawing.Color.Green;
    d.FillColor = System.Drawing.Color.Bisque;
    d.NegativeFillColor = System.Drawing.Color.Aqua;
    d.Maximum = new FarPoint.Win.Spread.ConditionalFormattingValue(15, FarPoint.Win.Spread.ConditionalFormattingValueType.Number);
    fpSpread1.ActiveSheet.SetConditionalFormatting(0, 0, 3, 3, d);    
}

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    FpSpread1.Sheets(0).Cells(0, 0).Value = 3
    FpSpread1.Sheets(0).Cells(1, 0).Value = -2
    FpSpread1.Sheets(0).Cells(1, 1).Value = 10
    FpSpread1.Sheets(0).Cells(0, 2).Value = 1
End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim d As New FarPoint.Win.Spread.DatabarConditionalFormattingRule()
    d.ShowBorder = True
    d.AxisColor = System.Drawing.Color.DarkOrange
    d.UseNegativeBorderColor = True 
    d.NegativeBorderColor = System.Drawing.Color.Green
    d.FillColor = System.Drawing.Color.Bisque
    d.NegativeFillColor = System.Drawing.Color.Aqua
    d.Maximum = New FarPoint.Win.Spread.ConditionalFormattingValue(15, FarPoint.Win.Spread.ConditionalFormattingValueType.Number)
    FpSpread1.ActiveSheet.SetConditionalFormatting(0, 0, 3, 3, d)
End Sub