Serial Port Monitoring Control (SPMC) - RS232 Data Acquisition and Com Port Control Component Library, Modem Access Component. Connection Sniffer and Port Test Software Library. The library lets you enumerate all installed serial devices, including, but not limited to serial ports and modems. All kind of PnP serial devices as well as virtual devices are also supported. After you get an instance of the serial device, you can create a monitor object and attach to the device to receive monitored data and events. The Monitor object can be attached to the device at any time, no matter if the device is being currently used or not. You can also detach from the device at any time. Supporting a wide variety of programming languages and platforms, the SPMC library makes it very easy to start using it in your software project.

Features:

The HHD Software Serial Port Monitoring Control library offers the following functionality:

Support for PnP and virtual serial devices with hot-plug and hot-unplug functionality.
Ability to work with any software that opens a serial port and initiate communication through it.
Interception of all data read from and written to the serial device.
Interception and detailed decoding of all serial input/output control codes (IOCTLs).
Full compatibility with ACPI features.
Support for Windows 2000/XP/2003 Server and Windows Vista Beta operating systems.
Two high-performance mechanisms for native code and one high-compatibility interface for managed code.
High compatibility with all modern development environments, including Microsoft Visual Studio 2005, .NET 2003, 6.0, Borland Builder, Borland Delphi.
Library client code can be written in any language, including C++, Delphi, C#, VB.NET and any other CLR-compatible language.
Ease of redistribution and registration.
Flexible licensing policy.