multiple arguments to signal event

[jay <mocat best com>]

Say I have a button and I attach a signal handler onto it:

gtk_signal_connect(GTK_OBJECT(button),"clicked",GTK_SIGNAL_FUNC(handler),
NULL);

How can I pass multiple arguments (like two text entry fields) to the
handler function?  I've gone through multiple versions of the gtk
documentation, the faq, and have looked through quite a bit of code, and
still can't figure it out.
Excuse me if this is a stupid question... I'm quite new to gtk.