I''m really sorry, but sometimes I feel just I''m a little bit dumb... and this is the case. I''m stiil using the TextValidator class. If I use the standard filtering options much of the characters normally used are filtered out. The Wx::FILTER_ALPHANUMERIC option filters out anything which is not [a-z], [A-Z] or [0-9]. It would be nice to use dots, bars and underscores too, so I thought to call the set_includes method, but with no result. Can anyone tell me which kind of parameter should I pass to set_includes? Can anyone give me few lines of working code? Thanks in advance to anyone Luciano