label with format string

[Johannes =?utf-8?B?V2Vpw59s?= <jargon hurg org>]

Hello,

is it possible to print text in a GtkLabel like the function
"printf" does?

e.g.:
void gtk_label_printf (GtkLabel *label, const gchar *format, ...);

Or are there other Widgets for this purpose?

-- 
cu,
Johannes Weißl