Changing Font in ComboBoxEntryText

["SaiKamesh Rathinasabapathy" <rsaikamesh gmail com>]

Hi,

I need to display the content of a Gtk::ComboBoxEntryText in big font.

I tried the following:
Gtk::ComboBoxEntryText combo;
.
.
.
Pango::FontDescription hg1("Sans");
hg1.set_size
(14000);
combo.modify_font(hg1);

But the font is not getting changed. What do I do to make it big?

Thanks.