Isn't the first one a device guid and the second one device INTERFACE guid?

>Any idea what is the difference between lc_HidGuid and ls_HIdGuid in the below code? They are not the same values, but I cannot figure out why...
>

>#DEFINE GUID_Size  16
>lc_HidGuid = SPACE( GUID_Size )
>ls_HidGuid = SPACE( GUID_Size )
>
>*The GUID_DEVCLASS_HIDCLASS guid below is taken from devguid.h
>*GUID_DEVCLASS_HIDCLASS, 0x745A17A0, 0x74D3, 0x11D0, 0xB6, 0xFE, 0x00, 0xA0, 0xC9, 0x0F, 0x57, 0xDA
>#DEFINE GUID_DEVCLASS_HIDCLASS ;
>	CHR(0xA0) + CHR(0x17) + CHR(0x5A) + CHR(0x74) + ;
>	CHR(0xD3) + CHR(0x74) + CHR(0xD0) + CHR(0x11) + ;
>	CHR(0xB6) + CHR(0xFE) + CHR(0x00) + CHR(0xA0) + ;
>	CHR(0xC9) + CHR(0x0F) + CHR(0x57) + CHR(0xDA)
>lc_hidGuid = GUID_DEVCLASS_HIDCLASS             && <--------------Check lc_hidGuid Value here
>
>DECLARE HidD_GetHidGuid IN HID ;
>     STRING @ O_sHidGuid
>HidD_GetHidGuid( @ls_HidGuid )                  && <--------------Check ls_HidGuid Value here
>

>Now compare the values of lc_hidGuid and ls_hidGuid, shouldn't they be the same?
>
>
>http://msdn.microsoft.com/library/default.asp?url=/library/en-us/Hid_r/hh/HID_r/hidfunc_61242b6f-b794-48c7-84b8-ef8d0d4e69af.xml.asp
>
>HidD_GetHidGuid
>The HidD_GetHidGuid routine returns the device interface GUID for HIDClass devices.
>
>VOID
> HidD_GetHidGuid(
> OUT LPGUID HidGuid
> );
>
>
>Parameters
>
>HidGuid
>Pointer to a caller-allocated GUID buffer that the routine uses to return the device interface GUID for HIDClass devices.
>
>Return Value
>None.
>
>Headers
>Declared in hidsdi.h. Include hidsdi.h.
>
>Comments
>Only user-mode applications can call HidD_GetHidGuid.