, .Find .Replacement . Selection ( ), a Range (, ..) . (ActiveDocument.Content).
Sub FindReplaceStyle()
With ActiveDocument.Content.Find
.ClearFormatting
With .Font
.Bold = True
.Size = 14
.Italic = True
End With
.Format = True
With .Replacement
.ClearFormatting
With .Font
.Bold = False
.Italic = False
.Underline = wdUnderlineSingle
.Size = 12
End With
End With
.Execute Forward:=True, Replace:=wdReplaceAll, _
FindText:="", ReplaceWith:=""
End With
End Sub