Excel import (from active Excel)

Does anyone know how I can get a handle to an Excel already running? The user does not wait to open the same Excel sheet everytime he/she is changing a little number so it should be possible to run the class from Axapta that finds the handle to the open Excel and uses this for import. I was wondering if WINOLEAPI.GetRunningObjectTable was usefull, but I cant get it to work. /lars