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

Dim
state ment, you do not tell it again
(no tice that
ReDim
leaves off the
As Boolean
in our ex ample).
2. 
ReDim
erases the contents of the array, so be sure that you use it be -
fore you put any thing in the ar ray.
Using the new
Dim
state ment and the new 
Ini 
tial 
ize
pro ce dure, you
never have to change the VBA. This makes it easier for you be cause you can add
and change questions with no VBA changes, and it turns this into a pow erful tool 
for your students; they can make their own quizzes that use your VBA (see
Chapter 10 for more about templates). Some of you will want to teach your stu -
dents VBA, but most of you will not. If you can write the code, all they have to
do is create the questions and tie the but 
tons to the
RightAnswer
and
WrongAnswer
procedures.
I Don’t Know How Many Questions: ReDim to the Rescue 137

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Short-answer questions will still need VBA to check the an swer. You can
ei ther:
• stick to mul tiple-choice ques tions and never touch the above code, or
• use short-answer questions by writing
Question1
,
Question2
,
Question3
, etc., pro cedures for each short-answer question but
hav ing each
Ques 
tion
pro ce dure call
RightAnswer
and
WrongAnswer
, not spe 
cialized
RightAnswer1
and
WrongAnswer1
,
RightAnswer2
and 
WrongAnswer2
,
RightAnswer3
and 
WrongAnswer3
, etc., pro ce dures.
With either choice, your VBA is greatly simplified. You could prob ably even
teach your students to copy and paste new ques tion pro cedures, simply changing
the number of the question in the