Powerful PowerPoint for Educators: Using Visual Basic for Applications to Make PowerPoint Interactive

numCorrect
or
numIncorrect
if 
qAnswered
is 
False
; that is, the question has not yet been
an swered. In ad di tion
RightAnswer
sets 
qAnswered
to 
False
be fore go ing to
the next question, and
WrongAnswer
sets 
qAnswered
to 
True
be fore let ting
you try again (by not go ing to the next question).
Try Again and Again: An swer Again Af ter It’s Right
The previous ex ample works fine as long as your stu dents are forced to
move to the next question (and can’t come back) once they have got ten the right
answer. This gets more com plicated if you allow students to come back to ques-
tions later. The prob lem is that we need to keep track of more things; that is, we
96 Quizzes and Tests

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need variables to re member if each question has been an swered:
q1Answered
,
q2Answered
, etc. As you begin to un derstand this example, you might think of
other things that you want to remember. In a later example in this chapter, we
will keep track of not only which questions have been an swered but also what
those an swers were. If you want to try to go be yond the examples in this book,
remember that you can create as many vari ables as you want to keep track of as
many things as you want.
To al low students to re visit ques tions as many times as they want, you will
have to al ter your ques tion slides to in clude but tons that move to the next and
previous slides, as in Fig ure 7.2.
Figure 7.2. Ques tion Slide with Next and Previous But tons
The other change to your slides will be to tie your right and wrong an swer
buttons to new pro cedures. We will need a new pro cedure for each ques tion’s
right and wrong answers, rather than one pro cedure for all right an swers and one
for all wrong an swers. These spe cialized procedures will check the vari ables
(