Hilmar,

Although not quite the same, you can use _VFP.LanguageOptions = 1 to have the debuger inform you of undeclared variables. There are also a couple of programs out there in the community that help, but do not ask me the names for I completely forgot!

>Some languages have the option, not to make the variable local (or the equivalent in the corresponding language) by default, but to give a compiler error if the variable is not properly declared. I have seen something like this in Visual Basic, I think it was a command like "option explicit". (Note: My familiarity with VB is very superficial.)
>
>I would expect Visual FoxPro to behave similarly, with some option to give an error, or perhaps a warning, for non-declared variables - but I suspect it hasn't been implemented yet, even in the newest versions. Nor do I know if it would be easy to implement.