Thanks marc.
it's a spectrum analyser FSP40 from rohde and schwarz. my pc is under windows. i have to use GUI of matlab7.
i'm studying how gui works. i have to display many values of E, in fonction of bandwidth, video bandwidth, from a frequency to an another. but i don't know the langage. i would want to know, the "while....loop", how to display a word....
i studied VB and i hope, it will be the same thing.
thanks
Laurent