Need help geting the Electronic Serial Number (ESN) from a Symbol HandHeld PC

Question

I have a Handheld PC (Symbol MC9090) working with Windows CE 5.0 and I need to get the Serial Number (not the UniqueID).

I've tried with the KernelIOControl as suggested in many sites, but it returns the UniqueID, not the ESN.

A co-worker told me to try with the RCM2API32.dll RCM_GetESN, but i do not have the header of the method to import it.

I've tried this but isn't working.

    [DllImport("rcm2api32.dll", SetLastError = true)]
    private static extern string RCM_GetESN(string UID);

I couldn't find any manuals or reference sheets on the internet.

Can someone give me a hand on this?

Thanks in advance!

Nico.

-- Edit --

With a test program (BasicResCoords.exe) I can see the handheld's ESN. it uses the same DLL I'm dealing with.

Answer 1

Solved! i found a library that returns the ESN (and many other data). search for "Symbol ResourceCoordinator TerminalInfo", some sites has it to download.