GTK calender issue ?

["rush ta" <anjutagtk gmail com>]

hello..
I have developed an application for a handheld device touchscreen device !!
I am using a GTK calender widget in it !!

But one problem that i face is that the buttons to navigate the year &
months are too small..
Can i change the size of it !! Is there a way to customize the GTK calender
widget code ?
How can i do it ?

Please help me out ! I am very new to this !!

Regards
Rush