Microsoft Visual FoxPro Pound, Hash, Hashtag, Number Sign

Question

Let's say I have:

SELECT 0
USE VALID_MEMBER        ALIAS "D1"          EXCLUSIVE
ZAP
APPEND FROM SUMMARY FOR D1.SUBFLAG # 'D'    

What is the # sign's significance in the above statement?

I have not been able to find documentation.

Edit: I think it may be the c# equivalent of D1.SUBFLAG != 'D' but have no idea if that's correct.

Answer 1

I was correct. I edited some of our legacy code to find that var1 # var2 is equal to modern day boolean expressions of var1 != var2