Private Sub FpSpread1_ColumnWidthChanged(ByVal sender As System.Object, ByVal e As FarPoint.Win.Spread.ColumnWidthChangedEventArgs) Handles FpSpread1.ColumnWidthChanged
    For Each c As FarPoint.Win.Spread.ColumnWidthChangeExtents In e.ColumnList
        For i As Integer = c.FirstColumn To c.LastColumn
            ' FpSpread1の列幅をFpSpread2に設定します
            FpSpread2.ActiveSheet.Columns(i).Width = FpSpread1.ActiveSheet.Columns(i).Width
        Next
    Next
End Sub

private void fpSpread1_ColumnWidthChanged(object sender, FarPoint.Win.Spread.ColumnWidthChangedEventArgs e)
{
    foreach (FarPoint.Win.Spread.ColumnWidthChangeExtents c in e.ColumnList)
    {
        for (int i = c.FirstColumn; i <= c.LastColumn; i++)
        {
            // FpSpread1の列幅をFpSpread2に設定します
            fpSpread2.ActiveSheet.Columns[i].Width = fpSpread1.ActiveSheet.Columns[i].Width;
        }
    }
}