change font for the title

["=?GB2312?Q?=CD=F5=D2=E3?=" <gfkd_wangyi 163 com>]

hi
   I try to  change the font for the title of the window.I can set the title of the window easily using "gtk_window_set_title(my_window,my_tilte)" ,but how to set the font of the title? I want the title looked more nice.I have even go through the source code of gtk,but  can  not find the way to do this either.Please help me and mail me the answer,thank you very much!
	

	

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