With VSP ActiveX your application is capable of creating ports that will emulate real ones, so any application will communicate with a virtual COM port the same way as a serial device is communicating with a real serial port. Your application using VSP AX will be able to send data to a virtual COM port and other applications will receive it as from a real RS232 port. Virtual Serial Port ActiveX fully automates the work of creating virtual serial ports. A special function can be defined to find out about any event that occurred with the port: ports' state has changed or new data has been received or sent. Likewise, you can configure your application to be notified about any event that happened to the port in the process of communication with any Windows application - whether the port was opened or closed, flow control or control line status altered, signal lines wiring manipulated, baud rate changed, etc.