Just after sending the question i found the solution: comctl32.dll should be used native not builtin. Mit freundlichen Gruessen / Best regards Dipl.-Phys. Christoph Baumann --- SORCUS Computer GmbH Im Breitspiel 11 c D-69126 Heidelberg Tel.: +49(0)6221/3206-0 Fax: +49(0)6221/3206-66