It's Visual Basic 2012 Chapter 12 ex 3. In this exercise, you modify the Sales Express application coded in the chapter. Use Windows to make a copy of the Sales Express Solution folder. Save the copy in the ClearlyVB2012\Chap12 folder. ename the copy Modified Sales Express Solution. Modified Sales Express Solution folder. Open the code Editor window. Change the Do clause to use the While keyword rather than the Until keyword. If the counter contains the number 0, display a message informing the user that no sales amounts were entered. Display the message in a message box. After displaying the average sales amount, change the lblAvg control's BorderStyle property yo Boderstsltye.None, blink the text in the control five times, and then change the borderstyle property back to BorderStyle.FixedSingle. Save the solution and then start and test the application. Close the code Editor window and then close the solution.