>>
>>#DEFINE ONEVERSION .T.
>>
>>#IF ONEVERSION
>> My First code to test
>>#ENDIF
>>
>>When you would like to test a different version you would change your code to false.
>
>
>This does not seem to work (in my test) when running the program within IDE (not compiled). That is the code My First Code never fires.
>
>Thank you.

You need to compile the code first (just that program, not the whole application).