Public ReadOnly Property NumberToCopy As Integer

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

public int NumberToCopy {get;}

private void fpSpread1_DragFillBlock(object sender, FarPoint.Win.Spread.DragFillBlockEventArgs e)
{
    if(e.NumberToCopy > 3)
    {
        e.Cancel = true;
    }
}

Private Sub FpSpread1_DragFillBlock(ByVal sender As Object, ByVal e As FarPoint.Win.Spread.DragFillBlockEventArgs) Handles
FpSpread1.DragFillBlock
    If e.NumberToCopy > 3 Then
        e.Cancel = True
    End If
End Sub