private void 網掛け25_Click(object sender, RibbonControlEventArgs e)
        {
            //選択範囲の取得
            Range selection = (Range)Globals.ThisAddIn.Application.Selection;
            //選択範囲の数
            int count = selection.Areas.Count;
            //複数選択範囲を配列に入れる
            Range[] allRange = new Range[count];
            //それぞれの選択範囲について繰り返す
            foreach (Range r in selection.Areas)
            {
                //パターンを網掛け25%に
                r.Interior.Pattern = XlPattern.xlPatternGray25;
            }
        }