tanx a lot for all your informations,
c.pfaffenbichler i will first read all the pdf to be sure tu use correctly your code !
i'll let you know how i deal with your code
Do you know where i can find the two PSD ref you gave me ? i'll try a google search
in fact I have this book "power, speed..." but i didn't really find a solution, i'll take a better look
ojodegato tank you for your link, big help too , i need to learn to deal with all this to go further in my work !
really guys, so much help in one post... it's been months i'm looking to go further... tanx !
A