Hi! Playing with the custom dll's isn't be hard when you have simple type or structure passed/returned to/from dll. But when you have complex structure, it's real PITA.... You can e-mail me at mindripp@kuban.sbcorp.ru if you have more specific question... Have a happy day Vladimir Shevchenko > I'm going to be doing a lot of work interacting with custom .dll's, and > would sure appreciate anyone who has been there before me sending some > examples or tips.