setting font height for GtkTextview using pango

["prabahar k" <informpraba gmail com>]

Hi
   i am using pango fontdesc to set the font type, size for a GtktextView.
Is there any way to change the font height using pango.

   i have attached a screen shot of output. you can see the white space
between two lines (top and bottom of each row). how to avoid those spaces.
Please give your suggestion.

Thanks
prabahar k