Passing NULL to the function

[ikorot earthlink net]

Hi, ALL,
I am wondering if it is possible to pass NULL to
gtk_box_pack_start/gtk_box_pack_end?

Something like this:

gtk_box_pack_start(GTK_BOX(box), NULL, TRUE, TRUE, 2);

I want to add some panes to statusbar first, and then put some text
on them.

Thank you.