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Programming NetBIOS on OS/2

Recently I spent some time trying to understand a piece of networking code, and it turned out to be far more difficult than it should have been. The code in question is the NetBIOS interface of C-Kermit and was originally written in the early 1990s.

The comments suggest that one alternative, using ACSNETB.DLL, is the “Traditional NetBios interface” used by IBM’s LAN Adapter and Protocol Support (aka LAPS), OS/2 Extended Services, and Communications Manager/2. In 1993, IBM did what they arguably should have done a long time ago: The LAN Technical Reference was split into hardware-specific and more general programming documents: Starting with Warp Connect, both ACSNETB.DLL and NETAPI.DLL were shipped with the OS, and users who installed the file and print sharing component (i.e. LAN Requester) had both.

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