I'm using A6 v6.31.4

When I added EnableFog = false; to the pass, I get an error:

Error in effect:
Mat_basic_sgader(38): ID3DXEffectCompiler: Unrecognised state 'EnableFog'

So I played around with it a little, and I THINK its working (finally), but the command looked like this:

fogenable = false;

Thanks for the assist!!!
Now.... If only I could figure out the command to subtract one vector from another inside the shader....