/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#ifdef _MSC_VER
#pragma warning(push, 1) /* disable warnings within system headers */
#endif
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <msiquery.h>
#ifdef _MSC_VER
#pragma warning(pop)
#endif

#include <stdlib.h>

extern "C" UINT __stdcall RebuildShellIconCache(MSIHANDLE)
{
	// Rebuild icon cache on windows OS prior XP

	OSVERSIONINFO	osverinfo;

	osverinfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);

	if ( 
		GetVersionEx( &osverinfo ) && 
		VER_PLATFORM_WIN32_NT == osverinfo.dwPlatformId &&
		(
		5 < osverinfo.dwMajorVersion ||
		5 == osverinfo.dwMajorVersion && 0 < osverinfo.dwMinorVersion
		)
		)
	{
		return ERROR_SUCCESS;
	}

	HKEY	hKey;
	DWORD	dwDispostion;
	LONG	lError = RegCreateKeyEx( HKEY_CURRENT_USER, TEXT("Control Panel\\Desktop\\WindowMetrics"), 0, NULL, REG_OPTION_VOLATILE, KEY_SET_VALUE | KEY_QUERY_VALUE, NULL, &hKey, &dwDispostion );

	if ( ERROR_SUCCESS == lError )
	{
		TCHAR	szValue[256];
		TCHAR	szTempValue[256];
		DWORD	cbValue = sizeof(szValue);
		DWORD	dwType;
		int		iSize = 0;

		lError = RegQueryValueEx( hKey, TEXT("Shell Icon Size"), 0, &dwType, (LPBYTE)szValue, &cbValue );

		if ( ERROR_SUCCESS == lError )
			iSize = atoi( szValue );

		if ( !iSize )
		{
			iSize = GetSystemMetrics( SM_CXICON );
			itoa( iSize, szValue, 10 );
			cbValue = strlen( szValue ) + 1;
			dwType = REG_SZ;
		}

		itoa( iSize + 1, szTempValue, 10 );
		lError = RegSetValueEx( hKey, TEXT("Shell Icon Size"), 0, dwType, (LPBYTE)szTempValue, strlen( szTempValue ) + 1 );

		LRESULT	lResult = SendMessageTimeout(
			 HWND_BROADCAST,
			 WM_SETTINGCHANGE,
			 SPI_SETNONCLIENTMETRICS,
			 (LPARAM)TEXT("WindowMetrics"),
			 SMTO_NORMAL|SMTO_ABORTIFHUNG,
			 0, NULL);

		lError = RegSetValueEx( hKey, TEXT("Shell Icon Size"), 0, dwType, (LPBYTE)szValue, cbValue );

		lResult = SendMessageTimeout(
			 HWND_BROADCAST,
			 WM_SETTINGCHANGE,
			 SPI_SETNONCLIENTMETRICS,
			 (LPARAM)TEXT("WindowMetrics"),
			 SMTO_NORMAL|SMTO_ABORTIFHUNG,
			 0, NULL);

		lError = RegCloseKey( hKey );
	}

    return ERROR_SUCCESS;
}