how do you get a list of open file handles?

[adaptor]

�ne little addition to JuneMouse's answer:
given code enumerates _all_ handles, not just open file handles.
The way to determine witch of them are _file_ handles is to check ObjectType member of HandleInfo structure. ObjectType value for file type is different for different OS'es and, so, it must be detected dynamically. It could be done, for example, by searching known file handle.