Client / Server Communications Library for C/C++/C#

The MarshallSoft Client / Server Communications Library (CSC) is a communication component DLL library used to create server and client programs that can communicate with each other across any TCP/IP network such as the Internet.

Example Program

Features of CSC include:

• Supports both 32-bit and 64-bit Windows.
• Supports both UDP and TCP protocols.
• Can be used to create both clients and servers.
• Supports "one time" passwords for improved security.
• Data and files can be encrypted.
• Use with the AES4C, Advanced Encryption Standard (AES) Component Library for strong encryption.
• Supports challenge response authentication.
• Can send a Windows message when a connection is ready to accept.
• Can send a Windows message when incoming data is ready to be read.
• Can send and receive data buffers or entire files.
• Can connect to a device such as a relay device, scale device, GPS device or embedded computer device that is controlled by sending commands to its TCP IP address.
• Servers can handle multiple connections concurrently.
• Supports secure and private messaging.
• Can specify the maximum number of connections that the server will accept.
• Allows multiple servers and clients to run simultaneously.
• Create chat server and clients.
• Create client / server file transfer.
• Create client programs to talk to TCP servers (POP3, IMAP, HTTP, FTP, SMTP, DNS, etc.).
• Create SMTP proxy programs extracting a copy of all recipient addresses.
• Create POP3 proxy programs that filter incoming email for Spam.
• Create HTTP proxy used to filter content.
  
  
• Free technical support and updates for one year.
• Royalty free distribution with your compiled application.
• Evaluation versions are fully functional. No unlock code is required.
• Can be used from GUI mode or console mode programs.
• Is fully thread safe.
  
• Supports all 32-bit and 64-bit Windows through Windows 10.
• Works with Microsoft Visual Studio C/C++/C# through Visual Studio 2015).
• Works with Microsoft Visual C/C++ (4.0, 5.0, 6.0).
• Works with Borland C/C++ (5.0, 5.5, and Borland C++ Builder [all versions]).
• Also works with Microsoft Foundation Class, Watcom 11, Open Watcom, LCC-WIN32, Digital Mars, and MinGW GCC.
• Does not depend on support libraries. Makes calls to Windows API functions only.
• Implemented as a standard Windows DLL, which will work with all versions of Windows.
• Both Win32 and Win64 DLLs are included.
• Can be used with any program (in any compiler language) capable of calling Windows API functions such as Visual Basic, VB.NET, Visual FoxPro, Delphi, Xbase++, dBASE, COBOL, Access or Excel.
• License covers all programming languages.
• Can be purchased with (or without) C source code for the DLL.
• Updates are free for one year (Source code updates are separate).
• Unlimited one-year email and phone tech support.
• Documentation online as well as in printable format.

Current version of the Client/Server Comm Lib for C/C++ (CSC4C) is 7.1 (January 11, 2018). Registration is $119 for email delivery ($199 with C source code).