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Need a fix to my code in Visual Basic 2010!

This answer was rated:

Below is what the interface is displaying.  

This is what is supposed to do: (From Book)

you create an application that displays a monthly payment on a loan of $3000 for 1 year at 7% interest. The application also should display the amount applied to the loans principal each month, and the amount that represents interest. The application will use the Financial.Pmt method, which you learned about in the chapter, to

calculate the monthly payment. It also will use the Financial.PPmt method to calculate the portion of the payment applied to the principal each month. The methods syntax is Financial.PPmt(Rate, Per, NPer, PV), where Rate is the interest rate, NPer is the number

of payment periods, and PV is the present value of the loan. The Per argument is the payment period in which you are interested and must be from 1 through NPer.

a. List the output and input items, as well as any processing items, and then create an appropriate algorithm using pseudocode.

b. Create a Visual Basic Windows application. Use the following names for the solution and project, respectively: Principal and Interest Solution, and Principal and Interest

Project. Save the application in the ClearlyVB2010\Chap14 folder. Change the name of the form file on your disk to frmMain.vb. If necessary, change the forms name to


c. Create the interface shown in Figure 14-16. Set the text boxs Multiline and ReadOnly

properties to True.

d. Code the application using a ForNext statement to keep track of the

Financial.PPmt methods Per argument. The Per values will be from 1 through 12.

e. Save the solution and then start and test the application. (Hint: The monthly payment

should be $259.58. In the first month, 242.08 is applied to the principal, and 17.50 is

interest.) Close the Code Editor window and then close the solution.



This is my code:

Public Class Form1


    Private Sub btnDisplayPrincipal_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplayPrincipal.Click

        Dim MonthlyPayments As Double

        Dim bloanTotal As Double = 3000

        Dim rate As Double = 0.007

        Dim interest As Double

        Dim toPrincipal As Double

        Dim toInterest As Double

        Dim counter As Integer


        For counter = 1 To 12

            'Calculate the monthly payments

            MonthlyPayments =

                Math.Abs(Financial.Pmt(0.07 / 12, 12, 3000))

            TextBox1.Text = MonthlyPayments.ToString("C2")


            counter = counter + 1    'add one to the counter

            interest = bloanTotal + rate   'calculate interest rate from payment that will only count as interest

            toInterest = MonthlyPayments - interest ' amount of monthly payment going towards interest

            toPrincipal = MonthlyPayments - toInterest ' amount of monthly payment going towards principal

            bloanTotal = bloanTotal - toPrincipal ' new balance after deducting principal from beginning balance



            lblMonthlyPayment.Text &= toPrincipal.ToString & "   " & toInterest.ToString & ControlChars.NewLine



    End Sub


    Private Sub btnExit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExit.Click


    End Sub

End Class


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Customer: replied 4 years ago.

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This is also for monday may 13. Thanks!

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Customer: replied 4 years ago.
ok, I will provide you answer ASAP.

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