Nick,

It looks like you are attempting to concatinate 3 strings together. Are you doing this test from the command prompt within Fox?

I tried the same thing:
a = 'This'
b = 'is'
c = 'Bruce'

?a+b+c
gives me: ThisisBruce

or if you say
d=a+b+c

and then
?d

it should display the same string: ThisisBruce

Hopefully this answers your question.

Bruce