Random Letter Generator

[nicolas_soza]

como puedo hacer un generador de letras random en donde no se repitan las letras, y me muestre en una etiqueta cuales son las letras que me faltan generar?
(How can I make a random letter generator where the letters are not repeated, and it shows me in a label which letters I need to generate?)

[Ria_Das]

Puedes tomar una idea como hacer esto ..

Yet Another Random Password Generator

The AI2 communities abound with these, but here is another random password generator. You can set the minimum length, the length (most important!), and choose between lowercase and uppercase letters, digits, and special characters (one, some or all). I have excluded the "$" sign because this may not always be handled correctly without escaping the character (depends on what you are doing). This is what I started from, which is a simple but effective random password generator, I believe by @do…