IBM Open Class

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

IBM Open Class (IOC) is an IBM C++ product originally developed by Kevin Leong and originally 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. The non-GUI portions of IOC were available for z/OS and OS/400.

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 Windows, AIX, z/OS, and OS/400. Support for the OS/2 and Windows VisualAge for C++ compiler—as well as the accompanying IOC—was officially withdrawn by IBM on April 27, 2001. IOC was removed from z/OS 1.9, introduced in 2007.

Examples

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

 #include <iframe.hpp>
 int 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);

Notes

  1. ^ IBM's Withdrawal Announcement #901-013 (announced on January 23, 2001, effective on April 27, 2001)

External links


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