AssignOutputVariable a C gateway function which specifies which
parameters created inside the C gateway will be returned as an output
argument into Scilab.
CallOverloadFunction a C gateway function uses to call overload
function or macro
CheckInputArgument C function which checks the number of input
arguments present in the calling Scilab function.
CheckOutputArgument C function which checks the number of output
arguments present in the calling Scilab function.
ReturnArguments A C gateway function which returns the various
variables.