wndproform.pas

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unit WndProForm;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
  private
    Last: Integer;
  public
    procedure WndProc (var Message: TMessage); override;
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

uses
  ViewMsg, MList;

procedure TForm1.WndProc (var Message: TMessage);
begin
  if not (Message.Msg = Last) then
  begin
    with Form2.Listbox1 do
      ItemIndex := Items.Add (GetMessageName (Message.Msg));
    Last := Message.Msg;
  end;
  inherited WndProc (Message);
end;

end.