This application note introduces the dynamic-link library (DLL) that provides the programming interface for the CRX14 USB reader demonstration kit. The CRX14 USB reader demonstration kit is designed to show off the STMicroelectronics short range contactless memory product range. These contactless memories, such as SR176, SRIX512 and SRIX4K, are powered by a transmitted carrier radio wave, at 13.56MHz. The CRX14 USB reader demonstration kit can be controlled via the Universal Serial Bus (USB). The DLL, that is presented here, gives the application developer a wide variety of possibilities for working easily with this demonstration kit, even using just low level commands.