password and username code

[John Gordon]

In <1ed89545-f102-4538-bfe2-9d0e3dac8cf5 at googlegroups.com> =?UTF-8?B?w5ZtZXIgc2FyxLE=?= <sari.omer.1989 at gmail.com> writes:

> l want program if username is not registered, register first,
> then store it, and l want program ask for some specific characters,
> like 1,2,3../,%. 

What is your process for finding out if a name is registered?  There
are lots of possible ways to do it.  Do you have one in mind?

-- 
John Gordon                   A is for Amy, who fell down the stairs
gordon at panix.com              B is for Basil, assaulted by bears
                                -- Edward Gorey, "The Gashlycrumb Tinies"