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diff --git a/pofx/WDF/Driver/MultiComp/driver/HwSim.h b/pofx/WDF/Driver/MultiComp/driver/HwSim.h
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+++ b/pofx/WDF/Driver/MultiComp/driver/HwSim.h
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+/*++
+
+Copyright (c) Microsoft Corporation.  All rights reserved.
+
+    THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
+    KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
+    PURPOSE.
+
+Module Name:
+
+    HwSim.h
+
+Abstract:
+    Header file for the hardware simulation module of the KMDF sample driver for
+    a multi-component device.
+
+Environment:
+
+    Kernel mode
+
+--*/
+
+#include "WdfMultiComp.h"
+
+#if !defined(_HWSIM_H_)
+#define _HWSIM_H_
+
+NTSTATUS
+HwSimInitialize(
+    _In_ WDFDEVICE Device
+    );
+    
+VOID
+HwSimD0Entry(
+    _In_ WDFDEVICE Device
+    );
+    
+VOID
+HwSimD0Exit(
+    _In_ WDFDEVICE Device
+    );
+    
+VOID
+HwSimFStateChange(
+    _In_ WDFDEVICE Device, 
+    _In_ ULONG Component, 
+    _In_ ULONG State
+    );
+
+ULONG
+HwSimReadComponent(
+    _In_ WDFDEVICE Device, 
+    _In_ ULONG Component
+    );
+
+//
+// This structure represents the hardware simulation module's device context
+// space
+//
+typedef struct _HWSIM_CONTEXT {
+    //
+    // The following array tracks the F-state for each of the device's 
+    // components. It is used for verification purposes only.
+    //
+    ULONG ComponentFState[COMPONENT_COUNT];
+
+    //
+    // The following member tracks whether or not the device is in D0. It is 
+    // used for verification purposes only.
+    //
+    BOOLEAN DevicePoweredOn;
+
+    //
+    // The following member tracks whether or not we have previously entered the
+    // D0 state for this device
+    //
+    BOOLEAN FirstD0Entry;
+} HWSIM_CONTEXT, *PHWSIM_CONTEXT;
+
+WDF_DECLARE_CONTEXT_TYPE_WITH_NAME(HWSIM_CONTEXT, HwSimGetDeviceContext)
+
+#endif // _HWSIM_H_