学习 Message(15): 让窗体同时响应键盘事件的方法

KeyPreview := True; 即可, 它默认是 False; 这对一些快捷键会有用.

测试代码:

---

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    Memo1: TMemo;

    procedure FormCreate(Sender: TObject);

    procedure FormKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);

    procedure Memo1KeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



procedure TForm1.FormCreate(Sender: TObject);

begin

  Memo1.Align := alLeft;

  Memo1.ScrollBars := ssBoth;

  Memo1.Clear;



  KeyPreview := True;

end;



procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;

  Shift: TShiftState);

begin

  Memo1.Lines.Add('窗体响应的 KeyDown 事件');

end;



procedure TForm1.Memo1KeyDown(Sender: TObject; var Key: Word;

  Shift: TShiftState);

begin

  Memo1.Lines.Add('Memo1 响应的 KeyDown 事件');

end;



end.


 
   

窗体文件:

---

object Form1: TForm1

  Left = 0

  Top = 0

  Caption = 'Form1'

  ClientHeight = 145

  ClientWidth = 264

  Color = clBtnFace

  Font.Charset = DEFAULT_CHARSET

  Font.Color = clWindowText

  Font.Height = -11

  Font.Name = 'Tahoma'

  Font.Style = []

  OldCreateOrder = False

  OnCreate = FormCreate

  OnKeyDown = FormKeyDown

  PixelsPerInch = 96

  TextHeight = 13

  object Memo1: TMemo

    Left = 8

    Top = 8

    Width = 185

    Height = 89

    Lines.Strings = (

      'Memo1')

    TabOrder = 0

    OnKeyDown = Memo1KeyDown

  end

end