In this exercise, you will complete the Moonbucks application that you created in Exercise 2 in Chapter 2.
a. Use Windows to copy the Moonbucks Solution folder from the VB2017\Chap02 folder to the VB2017\Chap03 folder. Open the Moonbucks Solution.sln file contained in the VB2017\Chap03\Moonbucks Solution folder. The application’s Planning Chart is shown in Figure 3-36.
b. Use either a flowchart or pseudocode to plan the btnCalc_Click procedure. Enter the three Option statements in the Code Editor window. Code the procedure using variables and a named constant. Display the calculated amounts with a comma (if necessary) and two decimal places. Save the solution and then start and test the application. (If the current sales amount is 2300.75, the increase and projected sales amounts are 230.08 and 2,530.83, respectively.) 

c. Now professionalize your interface by coding the text box’s TextChanged and Enter event procedures. Save the solution and then start and test the application.

Data from Exercise 2.

Create a Windows Forms application. Use the following names for the project and solution, respectively: Moonbucks Project and Moonbucks Solution. Save the application in the VB2017\Chap02 folder. Change the appropriate properties of the form. Also, be sure to verify the name of the startup form. Use the Planning Chart shown in Figure 2-21 to build an appropriate interface. Code the Exit button. (You do not need to code the button that calculates and displays the two amounts.) Save the solution and then start the application. Test the access keys, tab order, and Exit button and then close the solution.

Planning Chart for the Moonbucks application Purpose: Calculate and display the increase and projected sales amounts. How? User-provided 1. current sales amount user will enter in txtCurrent Application-provided 1. 10% increase amount 2. projected sales amount 3. button for ending the application btnCalc_Click will calculate and display in Iblncrease btnCalc_Click will calculate and display in IbIProjected btnExit_Click will end the application Planning Chart for the Moonbucks application Purpose: Calculate and display the increase and projected sales amounts. How? User-provided 1. current sales amount user will enter in txtCurrent Application-provided 1. 10% increase amount 2. projected sales amount 3. button for ending the application btnCalc_Click will calculate and display in Ibllncrease btnCalc_Click will calculate and display in IbIProjected btnExit_Click will end the application