Thanks to Henning Meier-Geinitz for the answer. (I'm reading only the digest version, so I can't use the reply button)
I will try what you recommend. Greetings Hellmut -- Dr. Hellmut Weber Degenfeldstra?e 2, D - 80803 M?nchen-Schwabing tel (+49 89) 3081172, mobil (+49 172) 8450321 m...@hellmutweber.de ----------------------------------------------
