1.13 - Smaller Assignment 3
a form with:
- two textboxes which will hold numbers entered by the user.
-three buttons (one for Clear, one for Add, and one for Subtract)
your program runs the user will enter two numbers into the textboxes, and then
click on the add or subtract button.
The answer will be displayed as a label.
If the user clicks on the Clear button, then the textboxes will clear the numbers and the label will clear as well.