How to search for a missing property in a Delphi DFM component declaration?

Question

I'm trying to get all occurrencies of the TcxRadioGroup class which have not a value for the Caption property in Delphi DFM files.

I have to do this in a big groupproject with thousands of forms. For this reason I'm looking for a solution which can work on multiple files (I thought to use a RegEx in Notepad++ but I'm open to any other solution)

Example:

object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 494
  ClientWidth = 635
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object cxRadioGroup1: TcxRadioGroup
    Left = 0
    Top = 0
    Align = alTop
    Caption = 'cxRadioGroup1'
    Properties.Items = <>
    TabOrder = 0
    ExplicitLeft = 24
    ExplicitTop = 16
    ExplicitWidth = 185
    Height = 105
    Width = 635
  end
  object cxRadioGroup2: TcxRadioGroup
    Left = 0
    Top = 389
    Align = alBottom
    Properties.Items = <>
    TabOrder = 1
    ExplicitTop = 293
    Height = 105
    Width = 635
  end
  object Panel1: TPanel
    Left = 200
    Top = 111
    Width = 257
    Height = 265
    Caption = 'Panel1'
    TabOrder = 2
    object cxRadioGroup3: TcxRadioGroup
      Left = 8
      Top = 16
      Caption = 'cxRadioGroup3'
      Properties.Items = <>
      TabOrder = 0
      Height = 105
      Width = 185
    end
    object cxRadioGroup4: TcxRadioGroup
      Left = 8
      Top = 144
      Properties.Items = <
        item
          Caption = 'item 1'
        end
        item
          Caption = 'item 2'
        end>
      TabOrder = 1
      Height = 105
      Width = 185
    end
  end
end

In this example, I'm expecting to find cxRadioGroup2 and cxRadioGroup4 components.

---

1° Attempt:

I've tried to use a regular expression but I don't know how to find occurences which have not the Caption line... Using Notepad++, I've started by trying to catch each TcxRadioGroup block until their end line (the end line which has the same indentation).

^\s*object\s(\w*):\sTcxRadioGroup.*end with options /gms

It catches from object cxRadioGroup1 to the last end of the file

---

2° Attempt:

I've used lazy matching and reused the captured white spaces in order to match the right end for each component declaration.

^(\s*)object\s(\w*):\sTcxRadioGroup.*?\n\1end with options /gms

It finds all TcxRadioGroup declarations, each one from its beginning to its end. I think I should find a way to exclude the ones who contains \1 Caption =

I've prepared an online example.