Uff, first, I made a typo. I meant "class" instead of "call".. *g* Thanks for the hint with the 64bit-thingy. :) Second, I finally got it to work with some "assembler magic". (Well, honestly, there is no magic after all. ;) ) => http://www.lazarusforum.de/viewtopic.php?p=35280#p35280 Thanks for helping... :)