Document.HeaderCenter Property (Visio)
Contains the text string that appears in the center portion of a document's header. Read/write.
You can also set this value in the Center box under Header in the Header and Footer dialog box (click the File tab, click Print, click Print Preview, and then in the Preview group, click Header & Footer).
Both the string that HeaderCenter returns and the string to which you set it can contain escape codes that represent data. These escape codes can be concatenated with other text. For a list of valid escape codes you can use with the HeaderCenter property, see the FooterLeft property.