Using the Windows Interface

GAUSS User Guide
21.1 Writing FLI Functions
Your FLI functions should be written to the following specifications:
1. Take 0 or more pointers to doubles as arguments.
This does not mean you cannot pass strings to an FLI function. Just recast the double
pointer to a char pointer inside the function.
2. Take those arguments either in a list or a vector.
3. Return an integer.
In C syntax, then, your functions would take one of the following forms:
1. int func(void);
2. int func(double *arg1 [[,double *arg2,. . .]]);
3. int func(double *arg[]);
Functions can be written to take a list of up to 100 arguments, or a vector (in C terms, a
1-dimensional array) of up to 1000 arguments. This does not affect how the function is called from
GAUSS; the dllcall statement will always appear to pass the arguments in a list. That is, the
dllcall statement will always look as follows:
dllcall func(a,b,c,d[[,e...]]);
For details on calling your function, passing arguments to it, getting data back, and what the return
value means, see dllcall in the GAUSS Language Reference.
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