bool Variables, Autonomous Mode

[lasindi]

First off, can you declare bool variables? I tried to compile a boolean variable, just because 1 bit is more efficient than wasting a whole byte on a char or 2 on a short.
Second, I looked at ifi_aliases.h in the default code. At the bottom it uses a #define compiler directive to define the macro autonomous_mode. Could anyone show me how to use this? Would you use code like
if(autonomous_mode)
{
/* Do whatever I want the robot to do during autonomous mode. */
}
in the Process_Data_From_Local_IO() function user_routines_fast.c?
Thanks for the help.

lasindi