Win32s

Win32s is a system extension for Microsoft Windows 3.1 and Windows for Workgroups that can also be run as a WinOS/2 task with OS/2 Version 3 or higher and all versions of eComStation. It installs support for 32 bit executables and 4 new API's that prior to that had only been available in Windows NT and therefore allows for binary application portability between Windows NT and Windows 3.x.