I just wrapped this in NB last week, so if you have NativeBoost and Windows you can use:
NBWin32Process getCurrentProcessId (requires the latest packages from http://smalltalkhub.com/#!/~Pharo/NativeBoost) I'm sure on any other platforms there are API's as well to get the PID, like getpid on Unix. Should be easy to wrap in NB if you follow this tutorial: https://ci.inria.fr/pharo-contribution/job/PharoForTheEnterprise/lastSuccessfulBuild/artifact/NativeBoost/NativeBoost.pier.html Bye T.