OSMboxpend

I want to use OSMboxpend(). I can see the C source in os_mbox.c. The OS configuration tool in IDE does not list this function as an optional function to include, but the fucntion does work when I call it. I can hit a breakpoint set in this function in the os_mbox.c file.

But I have a still have a question.

1.) Where are the defines written to that are associated with the IDE uC-OSii settings. I mean, when I tell IDE to include one of these functions, where is the flag that tells the compiler to include this function written to? Is there a header file created? os_cfg.h does not seem to reflect the options I have selected for my project whatsoever.

thanks.