Word互操作替换文本

我使用以下函数查找和替换文本:

Microsoft.Office.Interop.Word.Application wordApp = new Microsoft.Office.Interop.Word.Application { Visible = true };
Microsoft.Office.Interop.Word.Document aDoc = wordApp.Documents.Open(fileName, ReadOnly: false, Visible: true);
            aDoc.Activate();
FindAndReplace(wordApp, "A", "B");
private void FindAndReplace(Microsoft.Office.Interop.Word.Application doc, object findText, object replaceWithText)
    {
        try
        {
            //options
            object matchCase = false;
            object matchWholeWord = true;
            object matchWildCards = false;
            object matchSoundsLike = false;
            object matchAllWordForms = false;
            object forward = true;
            object format = false;
            object matchKashida = false;
            object matchDiacritics = false;
            object matchAlefHamza = false;
            object matchControl = false;
            object read_only = false;
            object visible = true;
            object replace = 2;
            object wrap = 1;
            //execute find and replace
            doc.Selection.Find.Execute(ref findText, ref matchCase, ref matchWholeWord,
                ref matchWildCards, ref matchSoundsLike, ref matchAllWordForms, ref forward, ref wrap, ref format, ref replaceWithText, ref replace,
                ref matchKashida, ref matchDiacritics, ref matchAlefHamza, ref matchControl);
        }
        catch (Exception e)
        {
            throw e;
        }
    }

它工作得很好，但我想知道是否有任何方法将文本"A"替换为"B"格式的其他样式?我的意思是:将"A" FontColor="Black"替换为"B" FontColor="Red"。
换句话说，我想知道是否有可能改变文本"A"的颜色，或者用另一种颜色的"B"代替它。