Serial Port Control is an inexpensive, royalty-free, ActiveX component. You can use it with any ActiveX-enabled development environment, such as Visual C++, Visual Basic, Delphi, etc. Just put it on a form and you have all the functionality you need to access a serial port, either physical or virtual.

Serial Port Control automatically enumerates all the ports available in the system. You just need to select the port name you wish to work with. The event driven architecture of this component is a snap to use. You don't have to check ports periodically in order to find if there is new data available for reading from a port. Simply define a function in your program that will be triggered automatically by the appropriate event and process the data.