NCD ActiveX Control - Version 1.0 The NCD ActiveX Control makes it easy to control NCD devices from any programming language that supports ActiveX. It supports most NCD Devices except graphic display products. With it, you may create a complex control application in minutes. The NCD ActiveX control works great with ANY version of Visual Basic, and even allows you to send and receive raw serial data via the serial port.NCD Devices Development Lib supply powerful ActiveX for all NCD devices.NCD relay controllers allow computer controlled switching from the RS232 serial port of a microcontroller or computer.NCD video switchers allow computer controlled multiplexing of audio or vide signals from the RS232 serial port of your computer.