With the launch of CE 6.0 WinCE base team has done a commendable job of exploring lot of issues regarding memory usage inside drivers. Part of it was necessary because CE 6.0 now has overlapping address space ( lower 2GB ) for each process. But some other APIs and mechanisms introduced are a marvellous demonstration of how careful one needs to be when working with memory. An article on this topic by Sue Loh is fabulous. http://blogs.msdn.com/ce_base/archive/2006/11/09/Memory-marshalling-in-Windows-CE.aspx For those mere mortals among you, I will be publishing series of small articles explaining virtual memory in general and CE 6.0 issues in particular. I hope you enjoy them.