a stock ID
a stock size (#GtkIconSize). A size of (GtkIconSize)-1 means render at the size of the source and don’t scale (if there are multiple source sizes, GTK+ picks one of the available sizes).
a new pixbuf, or %NULL if the stock ID wasn’t known
Deprecated: Use gtk_icon_theme_load_icon() instead.
3.0
A convenience function that uses the theme engine and style settings for @widget to look up @stock_id and render it to a pixbuf. @stock_id should be a stock icon ID such as #GTK_STOCK_OPEN or #GTK_STOCK_OK. @size should be a size such as #GTK_ICON_SIZE_MENU.
The pixels in the returned #GdkPixbuf are shared with the rest of the application and should not be modified. The pixbuf should be freed after use with g_object_unref().