evento WMWindowPosChanging en TForm

[pborges36]

Holas. Necesito una ayuda. Estoy tratando de hacer un componente devirado de un TEdit, TKEdit, el cual, entre otras cosas, deberia habilitarme barras flotantes. Estuve viendo un ejemplo de nuestro amigo Neftali.

Código Delphi [-]
unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;
type
  TForm1 = class(TForm)
    Button1: TButton;
    Label1: TLabel;
    Label2: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Label2Click(Sender: TObject);
    procedure FormResize(Sender: TObject);
  private
    { Private declarations }
    procedure WMWindowPosChanging(var Message: TWMWindowPosChanging); message WM_WINDOWPOSCHANGING;
    procedure WMNCLButtonDown(var Message: TWMNCLButtonDown); message WM_NCLBUTTONDOWN;
    procedure _MoveFW();
  public
    { Public declarations }
  end;
var
  Form1: TForm1;
implementation
uses Unit2, Unit3, ShellAPI;
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
begin
  Form2.Visible := not Form2.Visible;
  Form3.Visible := not Form3.Visible;
  _MoveFW();
end;

procedure TForm1.WMWindowPosChanging(var Message: TWMWindowPosChanging);
begin
  _MoveFW();
  inherited;
end;
procedure TForm1.Label2Click(Sender: TObject);
begin
    ShellExecute(Handle,
             'open',
             'http://neftali.clubdelphi.com/',
             nil,
             nil,
             SW_SHOW);
end;

procedure TForm1.WMNCLButtonDown(var Message: TWMNCLButtonDown);
begin
  _MoveFW();
  inherited;
end;
procedure TForm1._MoveFW;
begin
//  if (Self.ComponentState <> []) then begin
//    Exit;
//  end;
  if not Assigned(Form2) then begin
    Exit;
  end;
  if not Assigned(Form3) then begin
    Exit;
  end;
  if (Form2.Visible) then begin
    // Posicionar las barras
    Form2.Top := Self.Top - Form2.Height;
    Form2.Left := Self.Left;
  end;
  if (Form3.Visible) then begin
    // Posicionar las barras
    Form3.Top := Self.Top;
    Form3.Left := Self.LEft + Self.Width;
  end;
end;
procedure TForm1.FormResize(Sender: TObject);
begin
  _MoveFW();
end;
end.

Form2 y Form3 son las barras flotantes y este ejemplo funciona a la perfeccion.
¿Como hago para asignarle desde el TKEdit los procedures WMWindowPosChanging, WMNCLButtonDown y FormResize al TForm que lo contiene?

El TKEdit esta mas o menos asi.

Código Delphi [-]
unit UnitKEdit;
interface
uses
  SysUtils, Classes, Controls, StdCtrls, Messages, Forms;
type
  TKEditi = class(TEdit)
  private
    { Private declarations }
    procedure WMWindowPosChanging(var Message: TWMWindowPosChanging); message WM_WINDOWPOSCHANGING;
    procedure WMNCLButtonDown(var Message: TWMNCLButtonDown); message WM_NCLBUTTONDOWN;
    procedure _MoveFW();
  protected
    { Protected declarations }
  public
    { Public declarations }
    constructor Create(AOwner : TComponent); override;    {Constructor}
  published
    { Published declarations }
  end;
procedure Register;
implementation
uses Unitbarra_horizontal, Unitbarra_vertical, ShellAPI;
procedure Register;
begin
  RegisterComponents('customer', [TKEdit]);
end;

constructor TKEdit.Create(AOwner : TComponent);
begin
    inherited Create(AOwner);
    barra_vertical:=Tbarra_vertical.Create(self);
    barra_horizontal:=Tbarra_horizontal.Create(self);
    barra_vertical.Visible:=true;
    barra_horizontal.Visible:=true;
    try
    _MoveFW;
    except
    end;
end;
procedure TKEdit._MoveFW;
begin
  if not Assigned(barra_vertical) then begin
    Exit;
  end;
  if not Assigned(barra_horizontal) then begin
    Exit;
  end;
  if (barra_vertical.Visible) then begin
    // Posicionar las barras
    barra_vertical.Top := Self.Parent.Top - barra_vertical.Height;
    barra_vertical.Left := Self.Parent.Left;
  end;
  if (barra_horizontal.Visible) then begin
    // Posicionar las barras
    barra_horizontal.Top := Self.Parent.Top;
    barra_horizontal.Left := Self.Parent.LEft + Self.Parent.Width;
  end;
end;
procedure TKEdit.WMWindowPosChanging(var Message: TWMWindowPosChanging);
begin
  _MoveFW();
  inherited;
end;
procedure TKEdit.WMNCLButtonDown(var Message: TWMNCLButtonDown);
begin
  _MoveFW();
  inherited;
end;
 
end.

Gracias!