>>#DEFINE's are string translations that take place at compile-time not run-time. That is, when PRG's etc. are converted into FXP's or EXE's etc.
>
>Houston,
>
>This isn't correct if the #DEFINE contains a function such as your INLIST() example. These are evaluated at run-time.

George,
I just entered the following code into VFP6 SP3 running on NT4 SP6.

#DEFINE Sunday 1
#DEFINE Saturday 7
#DEFINE AWeekend   INLIST( iDayOfWeek, Saturday, Sunday )

CLEAR
dCurrent = DATE()
iDayOfWeek = DOW( dCurrent )
IF (AWeekend) THEN
   ? "Yes it's a weekend."
ELSE
   ? "Not a weekend"
ENDIF

In my Edit, Preferences, I have 'Compile when saved' checked. After compiling the prg and running it for today (Monday), I get "Not a weekend", and then I changed the date to Sunday using my system clock and immediately ran the prg again (without any modifications and/or recompiling) - as expected the message changed to "Yes it's a weekend."

If the INLIST() is 'evaluated' at compile-time, why does the message change?