Public ReadOnly Property ColumnEnd As Integer

Dim instance As DragFillBlockEventArgs
Dim value As Integer
 
value = instance.ColumnEnd

public int ColumnEnd {get;}

private void fpSpread1_DragFillBlock(object sender, FarPoint.Win.Spread.DragFillBlockEventArgs e)
{
    textBox1.Text = "The beginning column is " + e.ColumnBegin + " and the ending column is " + e.ColumnEnd;
}

Private Sub FpSpread1_DragFillBlock(ByVal sender As Object, ByVal e As FarPoint.Win.Spread.DragFillBlockEventArgs) Handles
FpSpread1.DragFillBlock
    TextBox1.Text = "The beginning column is " & e.ColumnBegin & " and the ending column is " & e.ColumnEnd
End Sub