Hi Bernd, >How can I do this on an easy way? The easiest way to do it is to test for memory leaks in a test (non-production) environment. In that way, you can instrument the code any way that you find appropriate. You can even replace the memory manager with one of your own devising. Or some third-party memory manager, that has facility for tracking memory leaks. Such as the ones from <http://www.rational.com/>, the IBM Rational Suite (Purify, Quantify, et al). HTH, --Eljay Test early. Test often.