让Word替换标记字符串要使用WordDocument.Range.Find.Execute
下面的例子中用“Delphi”替换了“VB”：
var
FindText, MatchCase, MatchWholeWord, MatchWildcards, MatchSoundsLike,
MatchAllWordForms, Forward, Wrap, Format, ReplaceWith, Replace: OleVariant;
begin
FindText := 'VB';
MatchCase := False;
MatchWholeWord := True;
MatchWildcards := False;
MatchSoundsLike := False;
MatchAllWordForms := False;
Forward := True;
Wrap := wdFindContinue;
Format := False;
ReplaceWith := 'Delphi';
Replace := True;

WordDocument.Range.Find.Execute( FindText, MatchCase, MatchWholeWord,
MatchWildcards, MatchSoundsLike, MatchAllWordForms, Forward,
Wrap, Format, ReplaceWith, Replace );