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1) Study and understand your speech-based application: what it must recognize and what it must do with the results. 2) Read gxc.TUTORIAL to understand the input file format and how it works. 3) Write a GX grammar-with-actions file, let's call it task.gx The rest is just following your nose and filling in the blanks with the needed code, header files, and compilation steps. 4) Write a header file and C functions file to define any functions called by your action code, let's call them task_funcs.h, task_funcs.c (Of course task_funcs.c should probably also #include task_funcs.h) 5) Run "gxc -i task.gx -H task_funcs.h -l task.lat -s task.c" 6) Compile task_funcs.c to a linkable object file, as in: gcc -c task_funcs.c 7) Compile task and link in the functions, as in: gcc -o task task.c task_funcs.o 8) task will read an input file containing a sequence of words generated by following any path through task.lat, and execute the actions specified in task.gx.