// ============================================================================
//  Copyright (C) 2001-2016 by Jozef Starosczyk
//  ixen@copyhandler.com
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU Library General Public License
//  (version 2) as published by the Free Software Foundation;
//
//  This program 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 General Public License for more details.
//
//  You should have received a copy of the GNU Library General Public
//  License along with this program; if not, write to the
//  Free Software Foundation, Inc.,
//  59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
// ============================================================================
#include "stdafx.h"
#include "TWindowMessageFilterHelper.h"
#include "WindowsVersion.h"

typedef WINUSERAPI BOOL(WINAPI *ChangeWindowMessageFilterProc)(UINT message, DWORD dwFlag);

bool TWindowMessageHelper::AllowToReceiveCopyDataMessages()
{
	if(WindowsVersion::IsWindowsXP())
		return true;

	HMODULE hMod = LoadLibrary(L"User32.dll");
	if(!hMod)
		return false;

	ChangeWindowMessageFilterProc ChangeWindowMessageFilter = (ChangeWindowMessageFilterProc)GetProcAddress(hMod, "ChangeWindowMessageFilter");
	if(!ChangeWindowMessageFilter)
	{
		FreeLibrary(hMod);
		return false;
	}

	BOOL bResult = ChangeWindowMessageFilter(WM_COPYDATA, /*MSGFLT_ADD*/1);

	FreeLibrary(hMod);

	return bResult != false;
}