GUI application and Qt

Rick
I have done :
http://farm2440.blogspot.com.au/2010/07/hello-world-with-gui-application...

My question is, 
How can I add another button and function inside the form ?
I can add another button but has an issue on adding new function,

Anyone has a clue ?
And has anyone done with Qt4 ?

thanks

holger
With an actual version of the Creator is much more easy:-)

I have running Creator 2.4.1 with qt 4.7.4 (for amd64 and arm).
Then you can add buttons, label and so on by drag and drop. To add function
to a button, click right on it, select add slot, and implement in the
following codewindow your function. It's really easy. The hardest thing is
to compile and install qt. But their are more threads about this in this
forum.

fresher
no qt version found ...............


what i do to solve them .