Users of Pedigree for DOS who want to save trees and then convert them to Word-processor documents need a suitable font that has the box-drawing characters. Such a font is not normally installed.
Two suitable fonts have been identified: MS Linedraw and Letter Line Gothic. The former is installed and used by the utility program PedSpecs.
Microsoft Word does not accept LineDraw for running text. There are technical notes about this issue at http://support.microsoft.com/kb/q179422/ (for Word97) and http://support.microsoft.com/kb/291354/EN-US (for Word 2002).
The OpenOffice word-processor uses LineDraw quite happily.