TextBoxBase.GetPositionFromCharIndex Method (Int32)
Retrieves the location within the control at the specified character index.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
This method enables you to determine where in the control a specific character index is located. You can use this method for such tasks as displaying shortcut menu items or help information for a word in the control. For example, if you wanted to display a menu of options to the user when the user right clicks on a word in the control, you can use this method to determine the position of the word to properly display a ContextMenu control.
Available since 2.0