well ok ill explain it in words, the user will enter a username and click submit, the submit button will start a thread that will connect to mysql server and execute those queries and checks if username already exist if not then it will start another thread, the second thread creates a new Gtk2 window w/ the label

and then i get errors.

Ok, here is how to do that , the threading communication setup
Read more... (752 Bytes)

Then the background worker thread waits for instructions (jobs to do from $qin), and sends messages back (on $qout)

Read more... (565 Bytes)

Then the gui thread ... uses buttons to send jobs to worker thread, and sets up a timer to check for return messages from the worker thread

Read more... (868 Bytes)

Does that make sense? There are other ways to do threading, but its more complicated :) see What is the usage of "use Gtk2 -init -threads-init"? and https://metacpan.org/source/XAOC/Gtk2-1.2494/examples/thread_usage.pl and don't ask me about it :)