Newbie: How to access a window's widgets?

[Neoklis Kyriazis <neoklis users sourceforge net>]

Hi all,

I am taking my first steps writing a GTK app and I am using glade. This
has produced amongst others the interface.c file with a function to
create the top window with all its widgets, and a main.c where the top
window is declared and creatred.

I would like to know how I should access the widgets of the top window,
for example to get or set text in entry widgets, either in the main.c
function or other functions in my own files.

Please forgive me for asking a silly question!

My thanks in advance.

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