各式訊息視窗

unit Msgdlg;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    procedure Button5Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  ShowMessage('Hello World!!');
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  ShowMessagePos('Hello World!!', 10, 20);
end;

procedure TForm1.Button3Click(Sender: TObject);
var
  TheCaption, TheText: String;
begin
  TheCaption := '訊息標題';
  TheText := '訊息目的';
  if Application.MessageBox(PChar(TheText), PChar(TheCaption), MB_DEFBUTTON1 + MB_ICONEXCLAMATION + MB_OKCANCEL) = IDOK then
    ShowMessage('你選擇 OK')
  else
    ShowMessage('你選擇 Cancel');
end;

procedure TForm1.Button4Click(Sender: TObject);
var
  W: Word;
  S: String;
begin
  W := MessageDlg('選擇是、否或忽略', mtInformation, [mbYes, mbNo, mbIgnore], 0);
  case W of
    mrYes:    S := 'Yes';
    mrNo:     S := 'No';
    mrIgnore: S := 'Ignore';
  end;
  ShowMessage('你選擇 ' + S);
end;

procedure TForm1.Button5Click(Sender: TObject);
var
  W: Word;
  S: String;
  X, Y: Integer;
begin
  X := 50; Y := 75;
  W := MessageDlgPos('選擇終止、重試或忽略', mtWarning, mbAbortRetryIgnore, 0, X, Y);
  case W of
    mrAbort:  S := 'Abort';
    mrRetry:  S := 'Retry';
    mrIgnore: S := 'Ignore';
  end;
  ShowMessage('你選擇 ' + S);
end;
end.