Criando componente

unit Component1;

interface

uses
  System.SysUtils, System.Classes;

type
  TComponent1 = class(TComponent)
  private
    FAtlasText: string;
    procedure SetAtlasText(const Value: string);

    { Private declarations }
  protected
    { Protected declarations }
  public
    { Public declarations }
  published
    { Published declarations }
    property AtlasText : string  read FAtlasText write SetAtlasText;
  end;

procedure Register;

implementation

procedure Register;
begin
  RegisterComponents('Atlas Teste Comp', [TComponent1]);
end;

{ TComponent1 }

{ TComponent1 }

procedure TComponent1.SetAtlasText(const Value: string);
begin
  FAtlasText := Value;
end;

end.