ack! I finally get started on language master and I run into a jam. It seems GTK doesn't like people using class members as a callback. I have two choices, I make a non- class callback and use a struct data pointer that has a pointer to a class function, language number and toggle state. OR I can use gtk--. I dunno, it might be worth while to learn gtk--. I think I'll take it easy for a while longer. I just might try studying with these notes I collect. I dunno, in the past reading notes did nothing, and I still they they're a waste of paper.