Built using Windows Forms or WPF, providing interfaces for product selection, customer data entry, and invoice generation.
In the world of small to medium-sized enterprises (SMEs), billing and invoicing remain the backbone of daily operations. While cloud-based SaaS solutions dominate the headlines, many businesses still prefer—or require—a fast, reliable, offline-capable desktop application.
' Assume GST is stored per product Dim gstPercent As Decimal = Convert.ToDecimal(row.Cells("GSTPercent").Value) Dim lineAmount As Decimal = Convert.ToDecimal(row.Cells("Amount").Value) totalTax += (lineAmount * gstPercent / 100) Next vb.net billing software source code
Imports System.Data.SqlClient
End Class
If you don't want to start from scratch, many open-source and learning-oriented projects are available. Search for the following terms on , SourceForge , or CodeProject :
Live data entry grid that updates totals instantly. Built using Windows Forms or WPF, providing interfaces
ComboBox or Auto-complete TextBox for searching items, TextBox for Quantity, and an "Add Item" Button .