Program for PVC windows sellers gives the possibility to generate and print orders for windows. It enables the design and drawing of windows, the valuation of contracts, their record keeping and printing. It has an easy and intuitive graphical module to design windows. Adding new elements of the window is reduced to one, two or at most three clicks of the mouse. It is possible to modify a previously drawn window by changing or removal of its individual elements. The program allows you to add windows accessories to orders, calculates the cost of installation, customer discounts, and the importance of all windows of the contract. An important function is to calculate the thermal transmittance factor Uw. The advantage of the program is also a large number of languages. The program is available in versions in all major european languages. For the price of one license, the client may get any language versions they wish. The program allows you to make valuation in any currency among several dozen operated by him. The program saves used in the design window profiles, hardware, colors, glazing beads, muntins, fillings, and accessories. They can be used later when designing the next window, without having to enter their newly.