unit1.pas

学习Delphi最好的教材。通过一个个简单而实用的实例

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Shape1: TShape;
    procedure FormKeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  if Key=37 then Shape1.Left:=Shape1.Left-5;  //向左移动
  if Key=38 then Shape1.Top:=Shape1.Top-5;  //向上移动
  if Key=39 then Shape1.Left:=Shape1.Left+5;  //向右移动
  if Key=40 then Shape1.Top:=Shape1.Top+5;  //向下移动
end;

end.