>First foxpro evaluates the logical expression BOF() OR EOF() OR THIS.TOPFILE and than assigns result to THIS.TOPFILE.

This fact makes code like the following possible:

IsEqual = a = b

Which is equivalent to:

if a = b
  IsEqual = .T.
else
  IsEqual = .F.
endif

I have often used the expression of the above type, sometimes with parentheses:

IsEqual = (a = b)

The parentheses help clarify what is evaluated first; but after a while, I thought this should be quite obvious, and often omitted the parentheses.

Hilmar.