If you have the software, which works with some device connected to COM port and you want to capture all the data that goes to and from the port, then AVSD OEM is what you need. Just create one virtual port and tell the application to use it. Now you can monitor all data that application writes to the port and redirect it to the real COM port. And vice versa, you monitor all data coming from device and redirect it to the virtual port.

With AVSD OEM you can:

• Create your_protocol-to-serial abstraction.
• Create virtual platform and emulator plugins.
• Create usb2serial, bluetooth2serial, IrDa2serial adapters.

• communication with devices connected to serial port
• easy of use and very powerful
• uses multithreading and overlapping for maximum performance
• available for Delphi/C++ Builder 5 - XE4 and Lazarus 1.0.8
• source code included in full version
• royalty free distribution in applications

This professional Serial Port component is compatible with Microsoft Windows 95/ 98/ NT/ ME/ 2000/ XP/ Vista, Microsoft Visual Basic 5, 6, .NET; Microsoft Visual C++ 5, 6, .NET; Inprise/Borland Delphi 3-7, Inprise/Borland C++ Builder 3-6 and .NET technology.
 
Fully functional
Source: None
Price: $79.95

An application using this component should copy the file 'GWIOPM.SYS' to its exe path location.
 
Fully functional
Source: Included
Exe-Demo Included

For dispatch of messages connection to GSM modem or GSM phone is used through COM port. Supported codings: 7-bit, 8-bit, ucs-2, and also long messages.
 
Evaluation (time-limit)
Source: None
Price: $199

In Serial Port ActiveX you will find diverse methods to read/write to and from serial ports, plenty of properties for advanced configuration of serial ports as well as the complete range of events to control them. Integrating Serial Port ActiveX in your own software is quite easy thanks to sample code for major development environments that is bundled with our component. .
 
With Nag-Screen
Source: None
Price: $199.95

One of the system devices that you often need to support is a Serial Port. There are numerous lab instruments, protection gadgets and other inventory that can be connected via a COM port. Instead of spending weeks or even months for API coding, you could use a ready-made ActiveX component in your program. We recommend you give Serial Port Control from FabulaTech a try.

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.

Despite its low cost, the component is royalty-free. There are no hidden fees and you are free to distribute it together with your own software.
 
Trial (work while IDE is running)
Source: None
Price: $99.95

Supporting a wide variety of programming languages and platforms, the SPMC library makes it very easy to start using it in your software project.
 
Fully functional
Source: None
Price: $55.99

Some of the features are:

• Allows to monitor and edit serial data streams directly from your application;
• Unique ActiveX Control - no need to use additional software for monitoring;
• Wide selection of supported events, methods and properties;
• Control lines support (DTR, RTS, CTS, RTS);
• No reboot required during installation and implementation;
• Usage examples for Microsoft VC++ and Microsoft Visual Basic included.

• It use only WinAPI and Delphi functions, so no other third party software is needed.
• One single Thread for sending and receiving.
• Uses "Overlapped" for all Read and Write accesses.
• Total control of Timeout conditions.
• Total control of Linestates.
• Simple Implementation.
• Open Source.

The SuperCom ActiveX supports events like OnComm, OnModem, OnFileInfo, OnDataPacket.

The SuperCom ActiveX supports file transmission with protocols like ZMODEM, KERMIT, YMODEM, XMODEM and ASCII.

Optionally also available industrial protocols like 3964, RK512, AS511, MODBUS, LSV/2.
 
Demo only
Source: N/A
Price: $275
Exe-Demo Included

Custom protocols are developed only once. The Keys Technology also enables one single application to handle simultaneously connections through RS-232, TAPI, TCP/IP and ISDN. Building a network gateway e.g. from RS-232 to TCP/IP is now easy done.

The SuperCom Suite also supports file transmission with protocols like ZMODEM, KERMIT, YMODEM, XMODEM and ASCII.
 
Demo only
Source: None
Price: $995
Exe-Demo Included

This is list of basic features:

• SynaSer is not components, but only classes and routines. Not needed any installation.
• Working under Windows (Delphi or C++Builder) and under Linux (Kylix).
• Support for communicating on serial ports in blocking (synchronous) mode.
• Supported is high speed of communication (about few megabytes per second).
• Consume very low CPU time.
• Supported is same communication mechanism as used in Synapse TCP/IP library.
• Can lock serial port under Linux (like Windows do it).
• Support for software and hardware handshake.
• You may open any COM port, if exists in you system (i.e. COM156).
• Support for RTS driven communication (good for RS485 convertors, etc).
• Option for detect device presence before each data transmission.

The event-driven architecture provides the highest possible performance and allows all the tools to run in the background.

• Advanced class object structure.
• Advanced but easy to use design interface.
• Optimized event-driven architecture.
• Provides the highest possible performance.
• Supports all important transfer protocols.
• Components to build advanced comport servers.
• Easy to use with any type of serial hardware.
• Links directly to your EXE, no runtime.
• Built-in support for XModem, YModem and ZModem protocols.
• Handles COM ports > 9 and also virtual COM ports (mapped on USB RS485 devices for example).
• TVaTerminal component, providing a codeless terminal for asynchronous communications.
• TVaTerminal supports an extendable emulation interface.
• TTY emulation component and simple ANSI color sequence handling emulation component.
• TVaDisplay component to visualize modem status.

WSC4D features include:

• Can control any serial device connected to the serial port.
• Can be used from GUI mode or console mode programs.
• Can control multiple ports simultaneously.
• Is fully thread safe.
• Is port re-entrant.
• State driven Xmodem and Ymodem on multiple ports simultaneously.
• Can send Windows messages on completion of events (incoming character, etc.)
• Includes 16-bit (WSC16.DLL) and 32-bit (WSC32.DLL) versions.
• Does not depend on support libraries. Makes calls to Windows API functions only. Can also use with C/C++, Visual C++, .NET, Visual Basic (VB.NET), Visual FoxPro, Visual dBase, PowerBASIC, Xbase++, and COBOL.
• Supports Windows 95/98/Me/NT/2000/XP.

TXComm features:

• Custom flow control,
• Custom baud rate,
• Specifying event characters,
• Sending/receiving data,
• Plugins, etc.

• Sending AT commands to modem device,
• Modifying modem registers,
• Dialing, connecting, disconnecting, etc.

This device is a drag and drop component that requires little configurations - set the baud rate and Comm Port - and you are ready to go.

Despite its user-friendliness, it is packed with all the options you can find in WinAPI - Event Character, Custom Port Name, Flow Control, Maximum Send Queue, Parity, Stop Bits, Byte Size and all the time out settings available in WinAPI.

This Xtrimsoft component has been tested working since year 2000 and has been used in our company's production for several years. It is the first time it has been released as a freeware.
 
Fully functional
Source: None

You can use it also with USB and Bluetooth devices, because these devices have a driver that redirects the input from the USB or Bluetooth port to a virtual serial port (you can check it in System/Device Manager/Ports). If your device is not provided with such a driver, then use a USB controller whose vendor provides a virtual serial port driver, such as FTDI or use a USB/RS-232 adapter.

The demo version is fully functional in Delphi and C++Builder IDE, but it displays a nag dialog (the licensed version will, of course, not have a nag dialog and will not be limited to the IDE). The package includes demo programs for Delphi and C++Builder and a help file with the description of the component.
 
With Nag-Screen
Source: On purchase/registration
Price: $45.99
Source Price: $92.99

Use ZylSerialPortAX control to easily communicate with external devices on serial port connection, such as modems, bar code readers, GSM modules and others.

The demo version is fully functional. The package includes demo programs to show how ZylSerialPortAX works and a help file with the description of the component.
 
With Nag-Screen
Source: None
Price: $39.99