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diff --git a/lsteamclient/steamworks_sdk_112/isteamapps.h b/lsteamclient/steamworks_sdk_112/isteamapps.h
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+++ b/lsteamclient/steamworks_sdk_112/isteamapps.h
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+//====== Copyright � 1996-2008, Valve Corporation, All rights reserved. =======
+//
+// Purpose: interface to app data in Steam
+//
+//=============================================================================
+
+#ifndef ISTEAMAPPS_H
+#define ISTEAMAPPS_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+//-----------------------------------------------------------------------------
+// Purpose: interface to app data
+//-----------------------------------------------------------------------------
+class ISteamApps
+{
+public:
+	virtual bool BIsSubscribed() = 0;
+	virtual bool BIsLowViolence() = 0;
+	virtual bool BIsCybercafe() = 0;
+	virtual bool BIsVACBanned() = 0;
+	virtual const char *GetCurrentGameLanguage() = 0;
+	virtual const char *GetAvailableGameLanguages() = 0;
+
+	// only use this member if you need to check ownership of another game related to yours, a demo for example
+	virtual bool BIsSubscribedApp( AppId_t appID ) = 0;
+
+	// Takes AppID of DLC and checks if the user owns the DLC & if the DLC is installed
+	virtual bool BIsDlcInstalled( AppId_t appID ) = 0;
+
+	// returns the Unix time of the purchase of the app
+	virtual uint32 GetEarliestPurchaseUnixTime( AppId_t nAppID ) = 0;
+
+	// Checks if the user is subscribed to the current app through a free weekend
+	// This function will return false for users who have a retail or other type of license
+	// Before using, please ask your Valve technical contact how to package and secure your free weekened
+	virtual bool BIsSubscribedFromFreeWeekend() = 0;
+};
+
+#define STEAMAPPS_INTERFACE_VERSION "STEAMAPPS_INTERFACE_VERSION004"
+
+// callbacks
+#pragma pack( push, 8 )
+
+//-----------------------------------------------------------------------------
+// Purpose: posted after the user gains ownership of DLC & that DLC is installed
+//-----------------------------------------------------------------------------
+struct DlcInstalled_t
+{
+	enum { k_iCallback = k_iSteamAppsCallbacks + 5 };
+	AppId_t m_nAppID;		// AppID of the DLC
+};
+
+#pragma pack( pop )
+
+#endif // ISTEAMAPPS_H