Chapter 12 Exercises

Chapter 12- (use the methods learned from Shady Hollow)
Page 262- Exercise 3
for a point of extra credit, change the MaxLength of the Texbox to 1
Exercise 4- Open Department Solution
Change the textbox MaxLength to 1
Change the case to Upper
Make it so the textbox on accepts A, a, B, b
If user clicks the display button without entering a code,
display the text "not available"
Exercise 7- Open ABC Solutions
Modify the code so that it only accepts only numbers and backspace key