Getting XY location of text within TextBox/RichTextBox

Question

How to get coordinates of certain character within TextBox and/or RichTextBox?

I will try to explain this through function:

Point GetXY(int characterIndex) {
    //do some magic
    return new Point(x, y);
}

Idea is to find where selected text is located so Find dialog will not be displayed over this location but moved to side (like Word is doing).

Answer 1

GetPostitionFromCharIndex might be what you are looking for.