Private Function SaveCustomer(name As String, mobile As String, gstin As String) As Integer Dim query As String = "INSERT INTO Customers (Name, Mobile, GSTIN) VALUES (@name, @mob, @gst); SELECT SCOPE_IDENTITY()" Using conn As New OleDbConnection(connString) Dim cmd As New OleDbCommand(query, conn) cmd.Parameters.AddWithValue("@name", name) cmd.Parameters.AddWithValue("@mob", mobile) cmd.Parameters.AddWithValue("@gst", gstin) conn.Open() Return CInt(cmd.ExecuteScalar()) End Using End Function

To calculate the total price of items added to a list or grid, you can use a simple loop: Dim totalAmount As Decimal =

BillID (AutoNumber, PK) BillDate (Date/Time) CustomerID (Number) Subtotal (Currency) TaxAmount (Currency) DiscountAmount (Currency) GrandTotal (Currency)

: Good for older but stable VB.NET project structures.

Public Sub New(billID As Integer) InitializeComponent() Me.billID = billID LoadBillData() End Sub

Even with classic WinForms, you can modernize:

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Vb.net Billing Software Source Code Jun 2026

Private Function SaveCustomer(name As String, mobile As String, gstin As String) As Integer Dim query As String = "INSERT INTO Customers (Name, Mobile, GSTIN) VALUES (@name, @mob, @gst); SELECT SCOPE_IDENTITY()" Using conn As New OleDbConnection(connString) Dim cmd As New OleDbCommand(query, conn) cmd.Parameters.AddWithValue("@name", name) cmd.Parameters.AddWithValue("@mob", mobile) cmd.Parameters.AddWithValue("@gst", gstin) conn.Open() Return CInt(cmd.ExecuteScalar()) End Using End Function

To calculate the total price of items added to a list or grid, you can use a simple loop: Dim totalAmount As Decimal = vb.net billing software source code

BillID (AutoNumber, PK) BillDate (Date/Time) CustomerID (Number) Subtotal (Currency) TaxAmount (Currency) DiscountAmount (Currency) GrandTotal (Currency) Private Function SaveCustomer(name As String

: Good for older but stable VB.NET project structures. mobile As String

Public Sub New(billID As Integer) InitializeComponent() Me.billID = billID LoadBillData() End Sub

Even with classic WinForms, you can modernize: