>Unfortunately that won't be an advantage here, as the author, in some 100 .prgs, foolishly selects specific work areas all over the place, rather than 0. So any slected area (even when selected 0) may be overwritten. That's why I needed the u/t, to check whether or not he's used 25.

I had to deal with code like that a while ago. I think "an idot" is more fitting description for such programmer.

>Now in native fpd2.6 the highest selectable is 25. If build exe with the extended checkbox we can select up to 224 then? As I thought.

In development you can either run Foxpro.exe or FoxproX.exe (extended). Neither one is more "native" than other. The difference is that extended version can use memory beyond original 640Kb. I don't remember how it's releated to runtime though. Anyway, I don't see a reason for not using extended version in both cases.