TCurve it is a component that allows you to set dependence of one quantity from another on a range from 0 up to 1. It has many properties for adjustment of its interface and characteristics of curve, and also has methods of reception of coordinates of curve, storing and reading characteristic of curve in (from) ini-file etc. You can use TNurve to show, to define or to let user change any characteristics. For example, component like TCurve are used in Aldus PhotoShop to define curve of correction of color. Our program uses it to define dependence value of brightness of lamps from voltage Demo version of component doesn't allow using methods GetY e GetX.