12. The purpose of this exercise is to demonstrate a common error made when using functions. Open the Debug Solution (Debug Solution.sln) file contained in the VB2015\

Chap07\Debug Solution-Lesson C folder. Start the application. Click 20 in the Length list box, and then click 30 in the Width list box. Click the Calculate Area button, which should display the area of a rectangle having a length of 20 feet and a width of 30 feet.

Notice that the application is not working properly. Stop the application. Correct the application’s code and then test it appropriately.