Programming Section

Exam 3 Programming Section

This section is worth 75 points

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!