Public ReadOnly Property ColumnEnd As Integer

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

public int ColumnEnd {get;}

fpSpread1.DragDropBlockCompleted += new FarPoint.Win.Spread.DragDropBlockCompletedEventHandler(fpSpread1DragDropBlockCompleted);


private void fpSpread1DragDropBlockCompleted(object sender, FarPoint.Win.Spread.DragDropBlockCompletedEventArgs e) 
{ 
    fpSpread1.ActiveSheet.Columns[e.ColumnEnd].BackColor = Color.Yellow;
}

Dim eh As FarPoint.Win.Spread.DragDropBlockCompletedEventHandler = AddressOf FpSpread1DragDropBlockCompleted
AddHandler FpSpread1.DragDropBlockCompleted, eh

Private Sub FpSpread1DragDropBlockCompleted(ByVal sender As Object, ByVal e As FarPoint.Win.Spread.DragDropBlockCompletedEventArgs)
Handles FpSpread1.DragDropBlockCompleted
    FpSpread1.ActiveSheet.Columns(e.ColumnEnd).BackColor = Color.Yellow
End Sub