Vb.net Billing Software Source Code Extra Quality Jun 2026

VB.NET remains a powerful tool for rapid application development (RAD), especially for small business tools. By combining a clean UI with a structured SQL backend, you can create a reliable billing system tailored to specific needs.

Instead of coding the database structure, you start with a working skeleton. Your job shifts from "plumbing" to "customizing."

Example – Export invoice to PDF using QuestPDF: vb.net billing software source code

' Insert Invoice Dim invoiceQuery As String = "INSERT INTO Invoices (InvoiceNumber, CustomerID, InvoiceDate, SubTotal, GSTAmount, TotalAmount, PaymentMethod, Status) VALUES (@InvoiceNo, @CustomerID, @Date, @SubTotal, @GST, @Total, @PaymentMethod, 'Completed') SELECT SCOPE_IDENTITY()"

Public Sub CloseDB() If conn.State = ConnectionState.Open Then conn.Close() End If End Sub Your job shifts from "plumbing" to "customizing

| Module | Description | |--------|-------------| | | Add, edit, delete, search products (Code, Name, Unit, Price, GST%, HSN code). | | Customer/Party Master | Manage customer details, credit limits, and GSTIN numbers. | | Invoice/Bill Entry | Create new bills, add line items, auto-calculate totals, taxes, discounts. | | Print Invoice | Generate printable or PDF invoices with company logo and terms. | | Stock Management | Track inventory quantities, low stock alerts, and stock valuation. | | GST / Tax Reports | Show tax breakup (CGST, SGST, IGST) and generate GSTR-1 like summaries. | | Sales Report | View daily, monthly, or custom date range sales. | | Backup & Restore | Backup SQL Server or MS Access database with one click. |

Dim productID As Integer = Convert.ToInt32(cmbProductName.SelectedValue) Dim productCode As String = txtProductCode.Text Dim productName As String = cmbProductName.Text Dim quantity As Integer = Integer.Parse(txtQuantity.Text) Dim unitPrice As Decimal = Decimal.Parse(txtPrice.Text) Dim gst As Decimal = Decimal.Parse(txtGST.Text) Dim total As Decimal = Decimal.Parse(txtTotal.Text) | | Print Invoice | Generate printable or

Imports System.Windows.Forms