[Gnome-print] Printing a Document with a Image from a file

[Talus <talus46 netscape net>]

Hi once again i come to you can someone explain me how do i use this 
functions?:

/* Images */

int gnome_print_grayimage (GnomePrintContext *pc, const char *data, int 
width, int height, int rowstride);
int gnome_print_rgbimage (GnomePrintContext *pc, const char *data, int 
width, int height, int rowstride);
int gnome_print_rgbaimage (GnomePrintContext *pc, const char *data, int 
width, int height, int rowstride);
int gnome_print_pixbuf (GnomePrintContext *pc, GdkPixbuf *pixbuf);

I have the grid draw thank you very much. But i do need to insert a Logo 
in the document from a Image file can someone help me on that?

Thank you Very Much to All of you