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diff --git a/game/client/iclientmode.h b/game/client/iclientmode.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $Revision: $
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef ICLIENTMODE_H
+#define ICLIENTMODE_H
+
+#include <vgui/VGUI.h>
+#include "client_virtualreality.h"
+
+class CViewSetup;
+class C_BaseEntity;
+class C_BasePlayer;
+class CUserCmd;
+
+namespace vgui
+{
+	class Panel;
+	class AnimationController;
+}
+
+// Message mode types
+enum
+{
+	MM_NONE = 0,
+	MM_SAY,
+	MM_SAY_TEAM,
+};
+
+abstract_class IClientMode
+{
+// Misc.
+public:
+
+	virtual			~IClientMode() {}
+
+	// Called before the HUD is initialized.
+	virtual void	InitViewport()=0;
+
+	// One time init when .dll is first loaded.
+	virtual void	Init()=0;
+
+	// Called when vgui is shutting down.
+	virtual void	VGui_Shutdown() = 0;
+
+	// One time call when dll is shutting down
+	virtual void	Shutdown()=0;
+
+	// Called when switching from one IClientMode to another.
+	// This can re-layout the view and such.
+	// Note that Enable and Disable are called when the DLL initializes and shuts down.
+	virtual void	Enable()=0;
+
+	// Called when it's about to go into another client mode.
+	virtual void	Disable()=0;
+
+	// Called when initializing or when the view changes.
+	// This should move the viewport into the correct position.
+	virtual void	Layout()=0;
+
+	// Gets at the viewport, if there is one...
+	virtual vgui::Panel *GetViewport() = 0;
+
+	// Gets at the viewports vgui panel animation controller, if there is one...
+	virtual vgui::AnimationController *GetViewportAnimationController() = 0;
+
+	// called every time shared client dll/engine data gets changed,
+	// and gives the cdll a chance to modify the data.
+	virtual void	ProcessInput( bool bActive ) = 0;
+
+	// The mode can choose to draw/not draw entities.
+	virtual bool	ShouldDrawDetailObjects( ) = 0;
+	virtual bool	ShouldDrawEntity(C_BaseEntity *pEnt) = 0;
+	virtual bool	ShouldDrawLocalPlayer( C_BasePlayer *pPlayer ) = 0;
+	virtual bool	ShouldDrawParticles( ) = 0;
+
+	// The mode can choose to not draw fog
+	virtual bool	ShouldDrawFog( void ) = 0;
+
+	virtual void	OverrideView( CViewSetup *pSetup ) = 0;
+	virtual int		KeyInput( int down, ButtonCode_t keynum, const char *pszCurrentBinding ) = 0;
+	virtual void	StartMessageMode( int iMessageModeType ) = 0;
+	virtual vgui::Panel *GetMessagePanel() = 0;
+	virtual void	OverrideMouseInput( float *x, float *y ) = 0;
+	virtual bool	CreateMove( float flInputSampleTime, CUserCmd *cmd ) = 0;
+
+	virtual void	LevelInit( const char *newmap ) = 0;
+	virtual void	LevelShutdown( void ) = 0;
+
+	// Certain modes hide the view model
+	virtual bool	ShouldDrawViewModel( void ) = 0;
+	virtual bool	ShouldDrawCrosshair( void ) = 0;
+
+	// Let mode override viewport for engine
+	virtual void	AdjustEngineViewport( int& x, int& y, int& width, int& height ) = 0;
+
+	// Called before rendering a view.
+	virtual void	PreRender( CViewSetup *pSetup ) = 0;
+
+	// Called after everything is rendered.
+	virtual void	PostRender( void ) = 0;
+
+	virtual void	PostRenderVGui() = 0;
+
+	virtual void	ActivateInGameVGuiContext( vgui::Panel *pPanel ) = 0;
+	virtual void	DeactivateInGameVGuiContext() = 0;
+	virtual float	GetViewModelFOV( void ) = 0;
+
+	virtual bool	CanRecordDemo( char *errorMsg, int length ) const = 0;
+
+	virtual void	ComputeVguiResConditions( KeyValues *pkvConditions ) = 0;
+
+	//=============================================================================
+	// HPE_BEGIN:
+	// [menglish] Save server information shown to the client in a persistent place
+	//=============================================================================
+	 
+	virtual wchar_t* GetServerName() = 0;
+	virtual void SetServerName(wchar_t* name) = 0;
+	virtual wchar_t* GetMapName() = 0;
+	virtual void SetMapName(wchar_t* name) = 0;
+	 
+	//=============================================================================
+	// HPE_END
+	//=============================================================================
+
+	virtual bool	DoPostScreenSpaceEffects( const CViewSetup *pSetup ) = 0;
+
+	virtual void	DisplayReplayMessage( const char *pLocalizeName, float flDuration, bool bUrgent,
+										  const char *pSound, bool bDlg ) = 0;
+
+// Updates.
+public:
+
+	// Called every frame.
+	virtual void	Update()=0;	
+
+	// Returns true if VR mode should black out everything around the UI
+	virtual bool	ShouldBlackoutAroundHUD() = 0;
+
+	// Returns true if VR mode should black out everything around the UI
+	virtual HeadtrackMovementMode_t ShouldOverrideHeadtrackControl() = 0;
+
+	virtual bool	IsInfoPanelAllowed() = 0;
+	virtual void	InfoPanelDisplayed() = 0;
+	virtual bool	IsHTMLInfoPanelAllowed() = 0;
+
+	virtual void	OnDemoRecordStart( char const* pDemoBaseName ) = 0;
+	virtual void	OnDemoRecordStop() = 0;
+};	
+
+extern IClientMode *g_pClientMode;
+
+#endif