unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; type TForm1 = class(TForm) Button1: TButton; Button2: TButton; Button3: TButton; procedure FormCreate(Sender: TObject); procedure Button1Click(Sender: TObject); procedure Button2Click(Sender: TObject); procedure Button3Click(Sender: TObject); end; var Form1: TForm1; implementation {$R *.dfm} var MsgInfo, MsgErr: TForm; procedure TForm1.FormCreate(Sender: TObject); begin MsgErr := CreateMessageDialog('错误', mtError, [mbOK]); MsgInfo := CreateMessageDialog('提示', mtInformation, [mbYes, mbNo], mbYes); end; procedure TForm1.Button1Click(Sender: TObject); begin MsgErr.ShowModal; end; procedure TForm1.Button2Click(Sender: TObject); begin MsgInfo.ShowModal; end; procedure TForm1.Button3Click(Sender: TObject); begin case MsgInfo.ShowModal of IDYES: Text := 'Yes'; IDNO : Text := 'No'; else Text := 'Form1'; end; end; end.