>Can it be included in the main program of the project?
>
>would this make all constants available at runtime?
>
>(tastrade includes it in their main .prg)
>
>>>Hello...
>>>
>>>where should I put de Include file so it's taken into account when building my project?
>>>
>>>Is is possible to have more than 1?
>>>
>>>Thanx again
>>>
>>>Alfred
>>
>>It depends, you can include it in the classes, forms & reports.

Yes you can included in the main program of the project, but this doesn't mean that constants will be available for all forms & reports at runtime.
Wherever you need to use these constants you have to include the file.