Perhaps this is a old question, but as you can see in the name, i am more of a Unixman then a XPman I am trying to study on,and learn a bit more about XP, the xx-th OS, i have to work with. When i was looking at the memory management of 16Bits Apllications (XP), i noticed that those applications are still able to wander quitte clumsily into the memory in a shared address space or shared memory heaps/system recources used by other 16-bits applications. (Unless you manually force them not to do so) For 32Bit Applications those problems are solved. But how can i check if the application or process is 16 or 32Bit ? I thought that i saw something like this info , flashing by, while scanning in TDS,but i am not sure. I have TDS-3 , PG, PE, APT,APM etc. on my system, but if it is in there, i must have overlooked it.