C Interface

The Logic Server DLL has a functional interface and an object-oriented interface. C programmers call the functional Logic Server interface directly. These are the functions that begin with 'ls' and that are documented in this manual. There are no special considerations when using the Logic Server from C.

Hello Prolog

The sample program in the directory SAMPLES\C\HELLO is a console version of the basic hello program. It includes a make file for Visual C++ users. It is built by linking with AMZI4\LIB\AMZI4.LIB.

Borland C++ users should link with AMZI4\LIB\AMZI4B.LIB. This is a .LIB file created by running Borland's IMPLIB utility on AMZI4.DLL.

Unicode Support

To build a Unicode application, #define _UNICODE for the application.

All of the LSAPI functions that have character strings as arguments or return values have two versions. One version ends in 'A' (for ANSI) and the other ends in 'W' (for wide).

You still use the normal names of each function, but they are #defined to either the 'A' or 'W' version depending on whether or not _UNICODE is defined. If you explicitly want to use an ANSI version of a function in a _UNICODE application, you can explicitly call the 'A' version of the function.

The functions mbstowcs() and wcstombs() are used to convert between wide and multibyte (ANSI) strings, so multibyte character sets can also be used with the Logic Server.