Description

Adds the current state of the header or footer to the undo stack. Programmatic changes performed with the header's or footer's properties and methods are not automatically added to a TextControl's undo stack. Calling this method is not necessary, when the header's or footer's text and/or formatting is changed.

Syntax

public void AddUndoUnit();

Public Sub AddUndoUnit()

Examples

The following example creates a header for the first section and configures its content or layout by using HeaderFooter.AddUndoUnit.

HeaderFooterCollection headers = textControl.Sections[1].HeadersAndFooters;
headers.Add(HeaderFooterType.Header);
HeaderFooter headerFooter = headers.GetItem(HeaderFooterType.Header);
headerFooter.Selection.Text = "Quarterly report";

headerFooter.AddUndoUnit();
Console.WriteLine("Header Footer is ready for use.");

Dim headers As HeaderFooterCollection = textControl.Sections(1).HeadersAndFooters
headers.Add(HeaderFooterType.Header)
Dim headerFooter As HeaderFooter = headers.GetItem(HeaderFooterType.Header)
headerFooter.Selection.Text = "Quarterly report"

headerFooter.AddUndoUnit()
Console.WriteLine("Header Footer is ready for use.")