Calling C++ functions

["William L. Thomson Jr." <support obsidian-studios com>]

I am having problems calling C++ functions from my GTK buttons.

For example
gtk_signal_connect_object(GTK_OBJECT(new_button),"clicked",GTK_SIGNAL_FUNC(new_invoice),GTK_OBJECT(window));

Works fine if I do not wrap the new_invoice() function in a C++ class

So when I declare the function as

void Invoice::new_invoice()

I can't seem to get the proper syntax to the gtk button. I have tried 
gtk_signal_connect_object(GTK_OBJECT(new_button),"clicked",GTK_SIGNAL_FUNC(Invoice::new_invoice),GTK_OBJECT(window));

And even initialized a the class like
Invoice invoice;
gtk_signal_connect_object(GTK_OBJECT(new_button),"clicked",GTK_SIGNAL_FUNC(invoice.new_invoice),GTK_OBJECT(window));

Which worked in another case.

As stated in the past I am new to GTK, C and C++. I like the syntax of
C++, but seem to be pulling teeth to do the simplest of operations. So I
feel like I am pissing in the wind just to please my eyes. :)

Also while I am asking, what function can be used to close an inner
window. This
gtk_signal_connect_object(GTK_OBJECT(button),"clicked",GTK_SIGNAL_FUNC(gtk_exit),GTK_OBJECT(window));

will not only close a window, but it closes the main window closing all,
so what can I use instead of gtk_exit.

The window widget/object I am attaching is not the main window, and is
in a function all by itself, and in a different file, but being compiled
into the same single executable. Each window widget/object should only
exist in the function's scope. I have not made it a public or global
scope widget or anything.

Thanks

-- 
Sincerely,
William L. Thomson Jr.
Support Group
Obsidian-Studios Inc.
439 Amber Way
Petaluma, Ca. 94952
Phone  707.766.9509
Fax    707.766.8989
http://www.obsidian-studios.com