IBM Open Class

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 Support for the OS/2 and Windows VisualAge for C++ compiler, as well as the accompanying IOC, was officially withdrawn by IBM on April 27, 2001.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.

• C/Set++ v2.01 for OS/2 (1993)
• VisualAge C++ for OS/2, version 3.0
• VisualAge for C++ for Windows, version 3.5
• C and C++ Compilers for OS/2, AIX, and for Windows NT, version 3.6
• C and C++ Compilers for OS/2 and Windows, version 3.65 (1998?)
• VisualAge C++ Professional for OS/2 and Windows NT, version 4.0 (1998)

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);