>>Certainly yes
>>
>>>Are there tools to decompile VFP .EXE file to get source code?
>
>Yes. Two of the popular ones are ReFox and UnFoxAll, but are others.
>
>>>
>>>Are there ways to make your .EXE such that those tools would be unable to decompile the .EXE?
>
>There are tools that will make it more complicated, but not impossible.

Refox had a 'Branding' options which made it impossible to decompile if you don't have the branding password... but as any other password, a patient person with processing power available could break it. I don't have the latest Refox version so I'm not sure if that option's still in there.

Yanick