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The SocketTools Visual Edition consists of 16-bit Visual Basic (VBX) controls and both 16-bit and 32-bit ActiveX(OCX) controls for use with visual development environments such as Visual Basic, Visual C++ and Delphi. A totalof nineteen controls provide client interfaces for the major application protocols such as the File Transfer Protocol,Simple Mail Transfer Protocol, Domain Name Service and Telnet. All versions of Visual Basic from 2.0 and laterare supported, and the ActiveX controls can be used with any 32-bit development tool that supports COM and theActiveX control specification. The network controls support both synchronous (blocking) and asynchronous modesof operation and include trace debugging facilities. All of the controls are thread-safe and can be used inmultithreaded containers, such as Internet Explorer. The SocketTools Library Edition consists of 16-bit and 32-bit dynamic link libraries (DLLs), and can be used byvirtually any Windows programming language or scripting tool. A total of sixteen libraries provide client interfacesfor application protocols such as the File Transfer Protocol, Simple Mail Transfer Protocol and Telnet protocol. Theapplication program interface for the Library Edition is implemented with a simple elegance that makes it easy touse with any language, not just C or C++. All of the libraries are thread-safe and can be used in multithreadedapplications.