I think this thread made its point, but unfortunately for me the solution came from outside, from the saying:"the fastest way to get somewhere is following the road you know", that means that I had to do some wheel reinventing and create my own primitive but working for my machine dialog box...
Before ending I would like to thank all of you (especialy Moeur for his patience with a newby like me) for your time and advices. I've read everything all of you had written (including attachments) and I think they'll come very handy in my future projects!