The development of billing software using Visual Basic .NET (VB.NET) represents a practical application of the .NET framework to solve critical business administrative needs. At its core, billing software serves as a bridge between service delivery and revenue collection, automating the generation of invoices and the tracking of financial transactions. Architectural Overview
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick lblDateTime.Text = DateTime.Now.ToString() End Sub vb.net billing software source code
' Update stock Dim cmdStock As New SqlCommand("UPDATE tbl_Product SET StockQuantity = StockQuantity - @qty WHERE ProductID = @pid", con, transaction) cmdStock.Parameters.AddWithValue("@qty", row.Cells("Quantity").Value) cmdStock.Parameters.AddWithValue("@pid", row.Cells("ProductID").Value) cmdStock.ExecuteNonQuery() Next The development of billing software using Visual Basic