Programming Section



Exam 3 
using the form attached to Blackboard (or creating your own if you prefer), complete the following requirements to add a series of integers via the PowPow class to a collection and display the results in a list box on your form.
Sample Form:
The form has three text boxes for integers A, B, and C along with four buttons named ‘Add to List’,
‘Show Results’, ‘Clear List’, and ‘Close’.
General Requirements:
 The form should close if the user hits escape
 The form should try to add the values to the list if the user hits enter
 Null values and strings should not be allowed in the text boxes, therefore not added to the
collection
 Clearing the list should delete items from the list box AND the collection
 Create a PowPow Class and a PowPowCollection Module (more info below)
Add to List:
 This button will add the three integers to the PowPow Class, then add the object to the
PowPowCollection assuming all data is valid
 If the data is valid, a message box should appear saying the item was added to the collection
 If the data is not valid, a message box should appear stating there is an error
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Show Results:
 If there is no data in the collection, a message box should appear stating the collection is empty
 If there is data, the results of the objects in the collection should appear in the list box using the  following string format:
A: # B: # C: # – A^B^C = result
Example:
Clear List:
 Clicking this button clears the list box AND the collection
 Clicking ‘Show Results’ after this should display a message stating the collection is empty
Close:
 Closes the form
PowPow Class:
Create a PowPow class with the following properties:
New() – Creates a new instance of a PowPow object
SetA() – Write only property that sets the value for A
SetB() – Write only property that sets the value for B
SetC() – Write only property that sets the value for C
getPowPow() – Read only property that gets the result for A^B^C
ToString() – Overrides the ToString method and returns a string that contains the values for A, B, C, and
the result in the format needed for the Show Result button above: A: # B: # C: # – A^B^C = result
PowPowCollection Module:
Create a PowPowCollection module that contains a collection and an AddPowPow procedure that adds a PowPow object to the collection.
The AddPowPow procedure should be public and accept a PowPow object as its parameter. Make sure that either the AddPowPow procedure or your form code catches any exceptions!
Sample Test Data: