[IPHLPAPI][REACTOS] Add iphlpapi_undoc.h and add undocumented functions

Add NhGetInterfaceNameFromDeviceGuid() and NhGetInterfaceNameFromGuid().

Author: EricKohl

dll/win32/iphlpapi/iphlpapi_private.h

@@ -33,6 +33,7 @@
 #include <ndk/obfuncs.h>
 #include <ndk/rtlfuncs.h>
 #include <iphlpapi.h>
+#include <iphlpapi_undoc.h>
 #include "resinfo.h"
 #include <wine/debug.h>
 

sdk/include/reactos/iphlpapi_undoc.h

@@ -0,0 +1,22 @@
+#ifndef __IPHLPAPI_UNDOC_H__
+#define __IPHLPAPI_UNDOC_H__
+
+DWORD
+WINAPI
+NhGetInterfaceNameFromDeviceGuid(
+    _In_ const GUID * pInterfaceGUID,
+    _Out_writes_bytes_to_(*pOutBufLen, *pOutBufLen) PWCHAR pInterfaceName,
+    _Inout_ PULONG pOutBufLen,
+    DWORD dwUnknown4,
+    DWORD dwUnknown5);
+
+DWORD
+WINAPI
+NhGetInterfaceNameFromGuid(
+    _In_ const GUID * pInterfaceGUID,
+    _Out_writes_bytes_to_(*pOutBufLen, *pOutBufLen) PWCHAR pInterfaceName,
+    _Inout_ PULONG pOutBufLen,
+    DWORD dwUnknown4,
+    DWORD dwUnknown5);
+
+#endif /* __IPHLPAPI_UNDOC_H__ */