The external programs called from within the program must be written in C and
        incorporate the Altair IPC functions. 
        
            Two example programs containing Altair IPC functions are
                provided:
            Multiplication C-only Filter Example
            Simple Example
            One example contains C-only source code. The other example contains C source code
                that calls a 
Fortran subroutine. The source code for
                each sample is located in the install directory for the program.
Note: Altair IPC uses stdin and
                        stdout to communicate with the host program. Do not use
                        stdin or stdout when writing external
                    programs called through Altair IPC.