Hi Ronny, thank you for answering!!!! I use VO2.7 and the Audiotool-Lib was from Swift-Multimediatools, but i had the same problme with an other Lib. o i think, i make soamthing wrong. Bye the way - do you know a Audiotool-Lib wich works with VO (maybe with sample-code) Bye Michael -- Message posted using http://www.talkaboutprogramming.com/group/comp.lang.clipper.visual-objects/ More information at http://www.talkaboutprogramming.com/faq.html