Assignment 3

A)

Write a countdown timer program. It has a single button, B with a single click event. B.text starts as “10”. Fill in the program so that every time the button is click the number goes down by 1 until it gets to zero. At zero, the B.text should be “Blast off”. After blast off, further clicks should have no visible effect.

Class BlastOff

…

public sub B_click(…

End sub

End class

B)

This program has a button, B, and a textbox, T. When B is clicked, take the user input from T, converts it to a number and tells the user (with a message box) whether their input is positive, negative, or zero. If the user has entered an incorrect input ( that is not a number) the message “Incorrect input! Please enter a number” should be displayed. (You will need a vb function IsNumeric() for the check.)

Class BigLittle

…

public sub B_click(…

End Sub

End Class