Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
　　' 斜め罫線（左上から右下）の設定
　　Dim diagonalborder1 As New FarPoint.Win.ComplexBorderSide(Color.Blue, 2, System.Drawing.Drawing2D.DashStyle.Solid)
　　FpSpread1.ActiveSheet.Cells(4, 4).Border = New FarPoint.Win.ComplexBorder(Nothing, Nothing, Nothing, Nothing, diagonalborder1, False, True)
　　' 斜め罫線（左下から右上）の設定
　　Dim diagonalborder2 As New FarPoint.Win.ComplexBorderSide(Color.Green, 2, System.Drawing.Drawing2D.DashStyle.Dash)
　　FpSpread1.ActiveSheet.Cells(4, 5).Border = New FarPoint.Win.ComplexBorder(Nothing, Nothing, Nothing, Nothing, diagonalborder2, True, False)
　　' 斜め罫線（両対角線）の設定
　　Dim diagonalborder3 As New FarPoint.Win.ComplexBorderSide(Color.Gray, 2, System.Drawing.Drawing2D.DashStyle.Dot)
　　FpSpread1.ActiveSheet.Cells(4, 6).Border = New FarPoint.Win.ComplexBorder(Nothing, Nothing, Nothing, Nothing, diagonalborder3, True, True)
End Sub

private void Form1_Load(object sender, EventArgs e)
{
　　// 斜め罫線（左上から右下）の設定
　　FarPoint.Win.ComplexBorderSide diagonalborder1 = new FarPoint.Win.ComplexBorderSide(Color.Blue, 2, System.Drawing.Drawing2D.DashStyle.Solid);
　　fpSpread1.ActiveSheet.Cells[4, 4].Border = new FarPoint.Win.ComplexBorder(null, null, null, null, diagonalborder1, false, true);
　　// 斜め罫線（左下から右上）の設定
　　FarPoint.Win.ComplexBorderSide diagonalborder2 = new FarPoint.Win.ComplexBorderSide(Color.Green, 2, System.Drawing.Drawing2D.DashStyle.Dash);
　　fpSpread1.ActiveSheet.Cells[4, 5].Border = new FarPoint.Win.ComplexBorder(null, null, null, null, diagonalborder2, true, false);
　　// 斜め罫線（両対角線）の設定
　　FarPoint.Win.ComplexBorderSide diagonalborder3 = new FarPoint.Win.ComplexBorderSide(Color.Gray, 2, System.Drawing.Drawing2D.DashStyle.Dot);
　　fpSpread1.ActiveSheet.Cells[4, 6].Border = new FarPoint.Win.ComplexBorder(null, null, null, null, diagonalborder3, true, true);
}