change colors

[r palluk virgilio it]

i need to change the background of a gtk_label and i have try to use gdk_colormap
but when i start the program i have always segment fault. than i tryed to
create a event_box under the label and i have used the gtk_color_purge...
is ok but i don'n understand what i need to put in the arguments to obtain
an RGB color...
next... i can put in the gtk_event_box an image in the background??

thanks....

Roberto