Another option worth trying, is simply to replace your quotes with [ ] around your expression- which should make the substitutions you want.
#DEFINE ACTIVEROWFORECOL 16711680
#DEFINE ROWFORECOL 0
This.SetAll( 'DynamicForeColor', ;
[IIF( RECNO( This.RecordSource ) = This.nRecNo, ACTIVEROWFORECOL, ROWFORECOL )], 'COLUMN' )
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1