Windows supports standard NetBIOS (Interrupt 5Ch) functions in protected mode. All network control blocks (NCBs) and buffers must reside in fixed memory that is page-locked. To ease the porting of the application to other operating systems, all code that calls NetBIOS functions directly should reside in a DLL.
For additional information on NetBIOS support in Windows network drivers, see the Microsoft Windows Device Driver Adaptation Guide. For more information about developing applications for networks, see Chapter 19, “Network Applications.”