Source Code Generation You may generate source code via glade's "File" menu. this will create a few C source files, and an autoconf-based Makefile. The source generated will also include a 'main' function that creates one top-level window, as well as all the signal callbacks defined in the source. If you later edit the code, and then try to modify the GUI again using Glade and re-generate the code, most of your code will be preserved properly (except for a few bugs that'll cause glade to generate some odd code you'll neex to manually fix).