Antonio,
do you planned an xharbour build for FWPPC?
Thx,
Roberto Parisi
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Roberto,
Actually its not on our plans as xharbour is more complex and heavier than harbour and it will be quite difficult to port it to Pocket PC. Harbour already was complex enough to get ported
But you made the miracle either. 
Enrico,
The main difficulty is that Windows Mobile and Windows PC have many differences and there are many missing functions, so we had to build an intermediate layer to emulate the missing Windows API functions. Besides that, Pocket PC uses unicode, meanwhile Windows PC does not need it.
As xharbour has more code on it, it requires more Windows API functions, so the intermediate compatibility layer gets more complex.
Also the Harbour resulting EXEs are smaller, something that it is quite desirable for the Pocket PC which has limited resources.