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  ±è¿µ´ë(2004-07-27 18:08:29, Hit : 5429, Vote : 1373
 http://www.howto.pe.kr
 Keyboard hook À» »ç¿ëÇÑ OnKeyDown ±¸Çö

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Image1: TImage;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

function KeyboardHookProc(Code: Integer; WordParam: Word; LongParam: LongInt): LongInt; stdcall;

var
  Form1: TForm1;
  KBHook: HHook;
  cx, cy: integer;

implementation

{$R *.dfm}

function KeyboardHookProc(Code: Integer; WordParam: Word; LongParam: LongInt): LongInt;
begin
  case WordParam of
    vk_Space:
      with Form1.Image1.Canvas do
      begin
        Brush.Color := clWhite;
        Brush.Style := bsSolid;
        Fillrect(Form1.Image1.ClientRect);
      end;
    vk_Right: cx := cx + 1;
    vk_Left: cx := cx - 1;
    vk_Up: cy := cy - 1;
    vk_Down: cy := cy + 1;
  end;
  if cx < 2 then cx := Form1.Image1.ClientWidth - 2;
  if cx > Form1.Image1.ClientWidth - 2 then cx := 2;
  if cy < 2 then cy := Form1.Image1.ClientHeight - 2;
  if cy > Form1.Image1.ClientHeight - 2 then cy := 2;
  with Form1.Image1.Canvas do
    begin
      Pen.Color := clRed;
      Brush.Color := clYellow;
      TextOut(0,0,Format('%d, %d',[cx,cy]));
      Rectangle(cx - 2, cy - 2, cx + 2, cy + 2);
    end;
  Result := 0;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  KBHook := SetWindowsHookEx(WH_KEYBOARD, @KeyboardHookProc, HInstance, GetCurrentThreadId());
  cx := Image1.ClientWidth div 2;
  cy := Image1.ClientHeight div 2;
  Image1.Canvas.PenPos := Point(cx, cy);
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  UnHookWindowsHookEx(KBHook);
end;

end.





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