Index: src/chext/chext-utils.h
===================================================================
diff -u -N
--- src/chext/chext-utils.h	(revision 0)
+++ src/chext/chext-utils.h	(revision bc695e56772e5a5eb4574a17905afafb4c62b6dd)
@@ -0,0 +1,38 @@
+/***************************************************************************
+*   Copyright (C) 2001-2008 by J�zef 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.             *
+***************************************************************************/
+#ifndef __CHEXT_UTILS_H__
+#define __CHEXT_UTILS_H__
+
+inline HRESULT IsShellExtEnabled(IShellExtControl* piShellExtControl)
+{
+	if(!piShellExtControl)
+		return E_FAIL;
+
+	LONG lFlags = eShellExt_None;
+	HRESULT hResult = piShellExtControl->GetFlags(&lFlags);
+	if(FAILED(hResult))
+		return hResult;
+
+	if(lFlags & eShellExt_Enabled)
+		return S_OK;
+	else
+		return S_FALSE;
+}
+
+#endif
Index: src/chext/chext.rgs
===================================================================
diff -u -N
--- src/chext/chext.rgs	(revision 0)
+++ src/chext/chext.rgs	(revision bc695e56772e5a5eb4574a17905afafb4c62b6dd)
@@ -0,0 +1,11 @@
+HKCR
+{
+	NoRemove AppID
+	{
+		'%APPID%' = s 'chext'
+		'chext.dll'
+		{
+			val AppID = s '%APPID%'
+		}
+	}
+}