cchain.pas

delphi深度探索第二版随书光盘所附内容

unit CChain;

interface

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

type
  TForm1 = class(TForm)
    btn1: TButton;
    ApplicationEvents1: TApplicationEvents;
    btn2: TButton;
    procedure ApplicationEvents1Message(var Msg: tagMSG;
      var Handled: Boolean);
    procedure btn1Click(Sender: TObject);
    procedure btn2Click(Sender: TObject);
  private
    { Private declarations }
  protected
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.ApplicationEvents1Message(var Msg: tagMSG;
  var Handled: Boolean);
begin
  if (Msg.message= wm_lbuttonDown) and (Msg.hwnd=btn1.Handle) then
  begin
    ShowMessage('Button1点击被截获了');
    Handled:=True;
  end;
end;

procedure TForm1.btn1Click(Sender: TObject);
begin
  ShowMessage('Button1 Clicked');
end;

procedure TForm1.btn2Click(Sender: TObject);
begin
  ShowMessage('Button2 Clicked');
end;

end.