Open32

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Open32 API enables the migration of Windows applications to OS/2 by providing a subset of the Win32 APIs on OS/2 for source code compatibility. The Open32 API provides an identical interface as the function in the Win32 environment.

In "Open32 Developer API Extensions for OS/2 Warp" Redbook from IBM is clarified that Open32 is not a Win32 API emulation, it is a native OS/2 function that is built on the operating system just like other interface layers like GPI, Presentation Manager, Control Program, etc.

Files

File Name Comments
PMWINX.DLL Open32 API (a subset of about 800 Windows API's)
REGISTRY.DLL Windows-like registry support. Used by Open32.
DAPWSOCK.DLL Open32 Winsock API
USER.DAT If deleted this file gets re-created when REGISTRY.DLL is invoked.
SYSTEM.DAT If deleted this file gets re-created when REGISTRY.DLL is invoked.
WGSS46.DLL Additions to Open32 used to port Netscape Communicator
SYSFONT.DLL System font dynamic link library.

Documentation

  • Open32 Programming Guide and Reference
IBM Redbook
  • SG244719 - Open32 Developer API Extensions for OS/2 Warp by Theo Foster, Osamu Takagiwa, Franck Yu