Enumerating PciBusNumber PciDeviceNumber PciFunctionNumber in C++


I know how to enumerate all network cards using the SetupDiGetClassDevs, SetupDiGetDeviceInstanceId and SetupDiGetDeviceRegistryProperty API calls. However I need to go a step further and get the PciBusNumber PciDeviceNumber PciFunctionNumber for each network adapter installed - any ideas?

Many thanks in advance, if you can please try to include sample code - I'm rather new to C++ ...
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dcx45Author Commented:
Found the function - it's called

    IN PDEVICE_OBJECT  DeviceObject,
    IN ULONG  BufferLength,
    OUT PVOID  PropertyBuffer,
    OUT PULONG  ResultLength

Now, how do I get hold of PDEVICE_OBJECT???? (Ok that changes my initial question a bit, but hopefully I'll get there...)
dcx45Author Commented:
Right  foiund the funtction to get the pointer

    IN ACCESS_MASK  DesiredAccess,
    OUT PFILE_OBJECT  *FileObject,
    OUT PDEVICE_OBJECT  *DeviceObject

What format does the ObjectName need to be in - it's frustrating that MSDN doesn't include code samples for this
For example
RtlInitUnicodeString(&ObjName, L"\\Device\\00000050");

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