产生随机密码或字符串

function RandomPassword(PLen: Integer): string;
var
 str: string;
begin
 Randomize;
 //string with all possible chars
 str    := 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
 Result := '';
 repeat
   Result := Result + str[Random(Length(str)) + 1];
 until (Length(Result) = PLen)
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
 //generate a password with 10 chars
 label1.Caption := RandomPassword(10);
end;
// Another function from ReNoiZer /=RNZ=/; renoizer@mail.ru
function RandomWord(dictSize, lngStepSize, wordLen, minWordLen: Integer): string;
begin
 Result := '';
 if (wordLen < minWordLen) and (minWordLen > 0) then
   wordLen := minWordLen
 else if (wordLen < 1) and (minWordLen < 1) then wordLen := 1;
 repeat
   Result := Result + Chr(Random(dictSize) + lngStepSize);
 until (Length(Result) = wordLen);
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
 //generate a password with 10 chars
 Caption := RandomWord(33, 54, Random(12), 2);
end;