--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hti/PC_Tools/HTIGateway/HtiGateway/inc/DllModule.h	Wed Oct 13 16:17:58 2010 +0300
@@ -0,0 +1,75 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+* 
+* Description:
+*/
+
+#ifndef	_DST_DLL_MODULE_
+#define _DST_DLL_MODULE_
+
+class CDLLModule
+{
+public:
+	CDLLModule() : m_hDLL(NULL)
+	{
+	}
+	virtual ~CDLLModule()	//destructor, free the library
+	{
+		if (m_hDLL)
+			::FreeLibrary(m_hDLL);
+	}
+	//////////////////////////////////////////////////////////////////
+	// See if dll been loaded, returning true dose not mean that all
+	// functions of the dll is valid.
+	bool	IsLoaded(void) 
+	{
+		return m_hDLL != NULL;
+	}
+
+	/////////////////////////////////////////////////////////
+	//	pure virtual, must implemented in derived class
+	//	used macros to generate the implementation
+	virtual bool	Init(LPCTSTR szDll)=0;
+
+protected:
+	HMODULE m_hDLL;
+};
+
+//////////////////////////////////////////////////////////////////////
+// macros to implement the Init function
+#define DECLARE_DLL_FUNCTION(ret, cc, func, params) \
+	ret	(cc* func)params;
+
+#define BEGIN_DLL_INIT() \
+	bool Init(LPCTSTR szDll) \
+	{ \
+		if (m_hDLL) \
+			::FreeLibrary(m_hDLL); \
+		m_hDLL = ::LoadLibrary(szDll); \
+		bool	bOk = true;
+
+#define INIT_DLL_FUNCTION(ret, cc, func, params, origin) \
+		if (m_hDLL) \
+		{ \
+			func = (ret (cc* )params)GetProcAddress(m_hDLL, origin); \
+		} \
+		else \
+			func = NULL; \
+		if (!func) \
+			bOk = false;
+
+#define END_DLL_INIT() \
+		return bOk; \
+	} 
+
+#endif
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