IBM Open Class

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C Set++ v2.01 for OS/2, the first release of IOC/OCL/IUICL

1 General
2 Examples
3 History of IOC
4 Notes
5 External links

[edit] General

An IBM C++ product originally developed by Kevin Leong, IBM Open Class (IOC) was known under several names in the C++ industry, including ICL (IBM Class Library), UICL (User Interface Class Library), and OCL (Open Class Library).

IOC was an extensive set of C++ classes used to build CLI and GUI applications which could then be easily cross-compiled to OS/2, Microsoft Windows, and AIX. IOC also formed the basis for IBM's VisualAge for C++ graphical application builder.

[edit] Examples

The most widely recognized example of a simple application that uses the IOC is hello world:

#include <iframe.hpp>
void main()
{
    IFrameWindow frame ("Hello, World!");
    frame.showModally();
}

Other examples of commonly-used IOC classes and methods include:

#include <istring.hpp>
IString someText ("hello world");

#include <icmdhdr.hpp>
virtual Boolean MyHandler::command (ICommandEvent &event);

[edit] History of IOC

Promotional poster from 1993 showing parts of the class hierarchy for the IUICL v2.01

The IOC was included as part of IBM's C++ compiler environment. Applications developed with IOC could be distributed with a royalty-free runtime, or could be statically linked against the IOC libraries. Initially only available for OS/2, the IOC was eventually made available for both Windows and AIX. Support for the OS/2 and Windows VisualAge for C++ compiler -- as well as the accompanying IOC -- was officially withdrawn by IBM on April 27, 2001.^[1]