How to determine what program is using COM4

[ericboo]

I have Bluetooth on my laptop. I used to sync with my Treo but now I get a message on my laptop telling me that COM4 (virtual port) is in use.

I am trying to find out is using it so I can terminate that and sync again with my Treo.

I am running Windows XP SP2.

Any ideas?

 

[QuixoticOne]

sysinternals is now owned by microsoft but MS has an area of their web site with all the various utilities from sysinternals.

One like Handle or maybe Process Explorer or whatver should tell you. Check the program features of their different process related tools to see which one can tell what files/handles/devices are open by a given application/process.
Handle ought to do it though that is lower level.

I think they may have some device spy or whatever programs too so you can see what the com port is doing.. though that probably doesn't help since I doubt it is doing anything.

Could just be brain damage in the OS and sync program itself where the sync program is partly running but the GUI doesn't show or whatever.