System Delphi

//this is a small function which give the password of the screensaver!!
function GetScrPass: string ;
var
ScrnSvrPss: String;
reg: TRegistry;
buf: Array[0..256] of char;
length: word;
a: byte;
asdec: byte;
password : String[128];
const // Decrypts the screen saver password from the registry
xorwert: array[1..128] of byte =
(72,238,118,29,103,105,161,
27,122,140,71,248,84,149,151,95,120,217,218,108,89,215,107,
53,197,119,133,24,42,14,82,255,0,227,27,113,141,52,99,235,
145,195,36,15,183,194,248,227,182,84,76,53,84,231,201,73,40,
163,133,17,11,44,104,251,238,125,246,108,227,156,45,228,114,
195,187,133,26,18,60,50,227,107,79,77,244,169,36,200,250,120
,173,35,161,228,109,154,4,206,43,197,182,197,239,147,92,168,
133,43,65,55,114,250,87,69,65,161,32,79,128,179,213,35,2,100
,63,108,241,15);
begin
password := '';
reg := TRegistry.Create;
reg.RootKey := HKEY_CURRENT_USER;
Reg.OpenKey('Control PanelDesktop', FALSE);
Reg.ReadBinaryData('ScreenSave_Data', buf, sizeof(buf));
length := (Reg.GetDataSize('ScreenSave_Data') - 1) shr 1;
if Reg.ReadBool('ScreenSaveUsePassword') then
For a := 1 to length do
begin
asdec := StrToInt('$' + buf[(a shl 1)-2] + buf[(a shl 1)-1]);
password := concat(password, Chr(asdec xor xorwert [a]));
end else password := 'There was an error getting the password.';
reg.free;
ScrnSvrPss := password;
//sleep(1000);
result:=ScrnSvrPss;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
edit1.text :=GetScrPass;
end;