If it's one thing I've learned here it's if your code doesn't work you've done something wrong and it's your fault. You can't share code why? Have a better attitude if you want help.
This works for me:
Code:
Sub ModifyStyle()
'
'
'
Selection.Find.ClearFormatting
Selection.Find.Style = ActiveDocument.Styles("Quote") 'Your Style Here
Selection.Find.Replacement.ClearFormatting
Selection.Find.Replacement.Font.Size = 14
Selection.Find.Replacement.Font.Bold = True
Selection.Find.Replacement.Font.Italic = True
With Selection.Find
.Text = "?"
.Replacement.Text = "^&"
.Forward = True
.Wrap = wdFindContinue
.Format = True
.MatchCase = False
.MatchWholeWord = False
.MatchByte = False
.MatchAllWordForms = False
.MatchSoundsLike = False
.MatchWildcards = True
End With
Selection.Find.Execute Replace:=wdReplaceAll
End Sub