Module of questions:
1. I'm creating formats .txt, .tex and .rtf to export categories to a printable format (to be used in exam paper).
2. I'm insert a check box to ask if user want to shuffle questions.
3. I'm insert a list box with numbers. These are to create different models with the same questions in different order.
4. The exported file contained:
a. differents models (Model 0, Model 1 .. Model 10)
b. the same models with correct answers and feedbacks. (Model 0 with answers, Model 1 with answers ...)