In today's competitive business market, any business objects need to be updated and developed over a certain period of time. Today, the main goal of all companies is to improve the quality of service and increase competition with companies. Therefore, it is important to improve the company's service sector using information technology. The article presents the methodology and ways to create an application "NDNokno" dedicated to the company's service sector. Using this system, the type of products ordered by customers is quickly determined and their amount is calculated immediately. And through this system, you can see data about the type of window and its quality. The capabilities of the Microsoft Visual Studio environment are defined and the paths for creating the" NDNokno " application are specified. The application database was compiled in the phpMyAdmin environment in MySql. The program is written in the C# programming language. The app can be of great help to the customer in providing the type of product.