数値形式を変更できません。RegExp を使用して doc ファイルから数値を読み取りますが、形式は変更しません。コメント行が問題です。
Sub ChangeNumberFormat()
Dim SectionText As String
Dim RegEx As Object, Matches As Object, Match As Object
Dim i As Integer
Set RegEx = CreateObject("vbscript.regexp")
With RegEx
.Global = True
.MultiLine = False
.Pattern = "(\d{1,3}\s(\d{3}\s)*\d{3}(\,\d{1,3})?|\d{1,3}\,\d{1,3})"
End With
For i = 1 To ActiveDocument.Sections.Count()
SectionText = ActiveDocument.Sections(i).Range.Text
If RegEx.Test(SectionText) Then
Set Matches = RegEx.Execute(SectionText)
For Each Match In Matches
**Match = Format(Match, "##,##0.00")**
MsgBox Match
Next
Set MsgMatches = Nothing
Set Match = Nothing
End If
Next
Set RegEx = Nothing
End Sub