The document outlines a Visual Basic application that assists users in managing their budget by tracking income and expenses. It describes a program with elements such as input fields and buttons for entering and displaying financial data, including a balance and descriptions of transactions. The code involves a class for managing the budget and methods for adding income and subtracting expenses, alongside error handling for invalid inputs.

1. OVERVIEW
Please help with this application which helps an organization calculate the cost of expenses. This
Visual Basic program implements a budget application from the form below. The program has a
class called BudgetReceipts that keeps track of the balance and provides the ability to add to the
income and subtract to the expenses.
The application is designed with a two listboxes named lstIncome and lstExpenses , two
textboxes named txtAmount and txtIncome , two buttons named btnIncome and btnExpense ,
and a close button named btnClose . After an initial amount is entered by a user, the total dollar
amount is shown in the txtIncome textbox. When the bntIncome button is clicked, the user
enters a description of the income and the amount is added to the total. Please edit the code
below so that the description of the income and the amount is show in a static list to the user in
the lstIncome listbox.
When the btnExpense button is clicked, the user enters a description of the expense and the the
amount is subtracted from the total. Please edit the code below so that the description of the
expense and the amount is show in a static list to the user in the lstIncome listbox.
Please add comments throughout each sub of the code.
CODE
Public Class Form1
Private budget As BudgetReceipts
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim initialBalance As Double
Do
initialBalance = InputBox("Enter starting balance:", "Starting Balance")
Loop While initialBalance <= 0
budget = New BudgetReceipts(initialBalance)
txtIncome.Text = budget.Balance.ToString("C")
End Sub
Private Sub btnIncome_Click(sender As Object, e As EventArgs) Handles btnIncome.Click
If Not IsNumeric(txtAmount.Text) Then
MessageBox.Show("Please enter a valid amount.", "Invalid Amount")
Return
End If
Dim description As String = InputBox("Enter income description:", "Income Description")
If description.Trim() = "" Then
MessageBox.Show("Please enter a description.", "Invalid Description")
Return
End If

2. Dim amount As Double = CDbl(txtAmount.Text)
budget.AddIncome(description, amount)
txtIncome.Text = budget.Balance.ToString("C")
txtAmount.Text = ""
End Sub
Private Sub btnExpense_Click(sender As Object, e As EventArgs) Handles btnExpense.Click
If Not IsNumeric(txtAmount.Text) Then
MessageBox.Show("Please enter a valid amount.", "Invalid Amount")
Return
End If
Dim description As String = InputBox("Enter expense description:", "Expense Description")
If description.Trim() = "" Then
MessageBox.Show("Please enter a description.", "Invalid Description")
Return
End If
Dim amount As Double = CDbl(txtAmount.Text)
budget.SubtractExpense(description, amount)
txtIncome.Text = budget.Balance.ToString("C")
txtAmount.Text = ""
End Sub
Private Sub btnClose_Click(sender As Object, e As EventArgs) Handles btnClose.Click
Me.Close()
End Sub
End Class
Public Class BudgetReceipts
Private _balance As Double
Public Sub New(initialBalance As Double)
_balance = initialBalance
End Sub
Public ReadOnly Property Balance() As Double
Get
Return _balance
End Get
End Property
Public Sub AddIncome(description As String, amount As Double)
_balance += amount
MessageBox.Show(String.Format("Income added: {0} - {1:C}", description, amount))
End Sub

3. Public Sub SubtractExpense(description As String, amount As Double)
If _balance - amount < 0 Then
MessageBox.Show("Expense cannot be subtracted. Balance will go negative.")
Else
_balance -= amount
MessageBox.Show(String.Format("Expense subtracted: {0} - {1:C}", description, amount))
End If
End Sub
End Class
Final design