A COM DLL for creating network server applications on Windows 9x/NT/2000.
SocketQ is a high performance ActiveX/COM DLL designed exclusively for the purpose of creating high performance network server and client applications on Windows 9x/NT/2000. SocketQ achieves this by taking advantage of the fastest method for transferring data that is available on all of The Target platforms (called Overlapped I/O). Features include sync/asyn connects with timeouts, multi-threaded sending/receiving, support for multi-homed machines, access to socket options to change Winsock headers for connection customization, and more, all while still providing a simple interface to interact with.
The following is a Brief list outlining some of the features that SocketQ offers:

Simplified access to Winsock without sacrificing performance, functionality, or reliability

Number of connections limited only by machines resources

Support for multi-homed machines (multiple IP addresses)

Support for multiple aliases

Component designed specifically for building high bandwidth network applications: built around the Overlapped I/O model

Allows for integration with SecureStream for secure SSL connections (requires SecureStream product)

Allows access to high performance OS features of NT/2000/XP/2003 facilitating the sending of a file with one line of code while using the absolute minimum required system resources (file is sent from OS systems internal file cache)

Multi-threaded sending, receiving, and connecting ensures the highest levels of efficiency

Configurable buffers for receiving data

Asynchronous or synchronous connects, both with the ability to set a timout value

Access to all Winsock supported socket options to change Winsock headers for connection customization

Allows queuing of files to send via the TransmitByFileName method without waiting for each file to complete sending. you can free download SocketQ ActiveX Network Server SDK 3.0.0.12 now.