How to cut a piece of text from end to start?

Question

C++ / C#

There is a document in which there are many articles. It is known that after some technical information comes the title of the post (bold). It ends with the username highlighted in red.
I need to find the name, I find it like this:

{
            //Читаем активный файл на наличие вхождений
            object findText = surname.Text;
            //Сбрасываем форматирование
            Globals.ThisAddIn.Application.Selection.Find.ClearFormatting();
            //Производим поиск только в строках с красными буквами
            Globals.ThisAddIn.Application.Selection.Find.Font.ColorIndex = Word.WdColorIndex.wdRed;
            if (Globals.ThisAddIn.Application.Selection.Find.Execute(ref findText))
            {
                MessageBox.Show("Нашел");

            }
            else
            {
                MessageBox.Show("Не нашел.");
            }
        }

Help me figure out how to now find the preceding bold title and select all text (wdStory) from the bold title to the red username...

Answer 1

Everything turned out to be simple:
Find.Text.Forward:
true - search down
false - search up.

Answer 2

VSTO is a good thing...
Search by text color. Remember the position of the found character, look further. Find. Cutting test from... to... etc.
Read about the Word object model. It is a bit difficult to understand right away, but then it will be easier for you to implement your plan.