unitUnit1;interfaceusesWindows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,Dialogs, StdCtrls, ExtCtrls;typeTForm1 = class(TForm)Button1: TButton;RadioGroup1: TRadioGroup;procedure RadioGroup1Click(Sender: TObject);procedure FormCreate(Sender: TObject);end;varForm1: TForm1;implementation{$R *.dfm}varR: TRect;procedure TForm1.FormCreate(Sender: TObject);beginRadioGroup1.Items.CommaText := 'Undo,Rect,Bounds';R := Button1.BoundsRect;end;procedure TForm1.RadioGroup1Click(Sender: TObject);begincase RadioGroup1.ItemIndex of0: Button1.BoundsRect := R;1: Button1.BoundsRect := Rect(50,50,100,80); {參數(shù)3、4 是一個(gè)點(diǎn)}2: Button1.BoundsRect := Bounds(50,50,100,80);{參數(shù)3、4 分別是寬度與高度}end;end;end.