[Glade-users] Need basic help with glade!!!

[alex80it libero it (Alex Damiani)]

Hi! I have just converted myself (at last!!) to Linux, RedHat release 7,
to be exact.
I have been using things like C++Builder by Borland under Win
environments, and I saw that glade does the equivalent of the designing
part and file creation. When I go to edit the files to make my
application actually DO something, though, I am faced with a problem. I
must confess I'm not a wiz (just yet, hopefully), hence this is a very
basic question.
I'll give you an example of what I wanna do, so you can help me
directly, and I can learn from the example...

I have a button, called btnSaluta, I want the user to press that button
and subsequently change the text displayed in a label called lblOutput
on the same window as the button (window1, and on a panel fixed1).
I made an event handler for the "pressed" state of the button,
automatically called on_btnSaluta_pressed stored in a file called
callbacks.c

If I try to change the  text attribute of the lblOutput (which, if I'm
not wrong, I try to do with lblOutput->text), it says lblOutput is
undeclared.

My question is, how do I access the widgets on my form from this
callbacks file?
Also, is there no documentation about how to use glade? My "Help"
section in glade contains only the "About" option...

Thanking you in advance,
                                                        Alex