Hi Ashok,
Thanks for your response!
My use case is to get all open files related to a folder.
So I thought about asking the system for currently open files or all process for opened files (like SysInternal tools can do (Process Explorer|Monitor|Files Monitor|handle (console application)).
The other comp.lang.tcl topic about memory consumption in enumerating all processes collecting information about, was a kind of test in getting all processes to be (later) able to ask them for open files.
In my problem to be solved I need to delete a folder, depending on having no open files inside.
Eventually I should use a BATch file and SysInternals "handle" console application.
So you won't need to bother about extending twapi for one requesting user.
Best regards,
Martin