/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 * 
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

extern "C" {
#include <afs/param.h>
#include <afs/stds.h>
}

#include <afxpriv.h>
#include "stdafx.h"
#include <atlconv.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "afs_shl_ext.h"
#include "shell_ext.h"
#include "volume_info.h"
#include "set_afs_acl.h"
#include "gui2fs.h"
#include "make_mount_point_dlg.h"
#include "msgs.h"
#include "server_status_dlg.h"
#include "auth_dlg.h"
#include "submounts_dlg.h"
#include "make_symbolic_link_dlg.h"
#include <WINNT\afsreg.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


ULONG nCMRefCount = 0;	// IContextMenu ref count
ULONG nSERefCount = 0;	// IShellExtInit ref count
ULONG nICRefCount=0;
ULONG nTPRefCount=0;
ULONG nXPRefCount=0;

#define MAXSIZE 2048 /* most I'll get back from PIOCTL */
#define PCCHAR(str)	((char *)(const char *)str)
static char space[MAXSIZE];

static BOOL IsADir(const CString& strName)
{
    struct _stat statbuf;

    if (_stat(strName, &statbuf) < 0)
	return FALSE;

    return statbuf.st_mode & _S_IFDIR;
}

/////////////////////////////////////////////////////////////////////////////
// CShellExt

IMPLEMENT_DYNCREATE(CShellExt, CCmdTarget)
#define REG_CLIENT_PARMS_KEY    "SYSTEM\\CurrentControlSet\\Services\\TransarcAFSDaemon\\Parameters"
#define OVERLAYENABLED 1

CShellExt::CShellExt()
{
    HKEY NPKey;
    EnableAutomation();
    nCMRefCount++;
    HRESULT hr;
    UINT code;
    DWORD ShellOption,LSPsize,LSPtype;
    hr = SHGetMalloc(&m_pAlloc);
    m_bIsOverlayEnabled=FALSE;
    if (FAILED(hr))
	m_pAlloc = NULL;
    RegOpenKeyEx(HKEY_LOCAL_MACHINE, AFSREG_CLT_SVC_PARAM_SUBKEY,0, KEY_QUERY_VALUE, &NPKey);
    LSPsize=sizeof(ShellOption);
    code=RegQueryValueEx(NPKey, "ShellOption", NULL,
			  &LSPtype, (LPBYTE)&ShellOption, &LSPsize);
    RegCloseKey (NPKey);
    m_bIsOverlayEnabled=((code==0) && (LSPtype==REG_DWORD) && ((ShellOption & OVERLAYENABLED)!=0));
    TRACE("Create CShellExt, Ref count %d/n",nCMRefCount);
}

CShellExt::~CShellExt()
{
    if(m_pAlloc) 
	m_pAlloc->Release();
    nCMRefCount--;
    TRACE("Destroy CShellExt, Ref count %d/n",nCMRefCount);
}


void CShellExt::OnFinalRelease()
{
    // When the last reference for an automation object is released
    // OnFinalRelease is called.  The base class will automatically
    // deletes the object.  Add additional cleanup required for your
    // object before calling the base class.

    CCmdTarget::OnFinalRelease();
}	


BEGIN_MESSAGE_MAP(CShellExt, CCmdTarget)
    //{{AFX_MSG_MAP(CShellExt)
    // NOTE - the ClassWizard will add and remove mapping macros here.
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

BEGIN_DISPATCH_MAP(CShellExt, CCmdTarget)
    //{{AFX_DISPATCH_MAP(CShellExt)
    // NOTE - the ClassWizard will add and remove mapping macros here.
    //}}AFX_DISPATCH_MAP
END_DISPATCH_MAP()

// Note: we add support for IID_IShellExt to support typesafe binding
//  from VBA.  This IID must match the GUID that is attached to the 
//  dispinterface in the .ODL file.

#ifndef _WIN64
// 32-bit
// {DC515C27-6CAC-11D1-BAE7-00C04FD140D2}
static const IID IID_IShellExt =
{ 0xdc515c27, 0x6cac, 0x11d1, { 0xba, 0xe7, 0x0, 0xc0, 0x4f, 0xd1, 0x40, 0xd2 } };
#else
// 64-bit
// {5f820ca1-3dde-11db-b2ce-001558092db5}
static const IID IID_IShellExt =
{ 0x5f820ca1, 0x3dde, 0x11db, {0xb2, 0xce, 0x00, 0x15, 0x58, 0x09, 0x2d, 0xb5 } };
#endif

BEGIN_INTERFACE_MAP(CShellExt, CCmdTarget)
    INTERFACE_PART(CShellExt, IID_IShellExt, Dispatch)
    INTERFACE_PART(CShellExt, IID_IContextMenu, MenuExt)
    INTERFACE_PART(CShellExt, IID_IShellExtInit, ShellInit)
    INTERFACE_PART(CShellExt, IID_IShellIconOverlayIdentifier, IconExt)
    INTERFACE_PART(CShellExt, IID_IQueryInfo , ToolTipExt)
    INTERFACE_PART(CShellExt, IID_IPersistFile , PersistFileExt)
END_INTERFACE_MAP()

#ifndef _WIN64
    // 32-bit
IMPLEMENT_OLECREATE(CShellExt, STR_EXT_TITLE, 0xdc515c27, 0x6cac, 0x11d1, 0xba, 0xe7, 0x0, 0xc0, 0x4f, 0xd1, 0x40, 0xd2)
#else
    // 64-bit
IMPLEMENT_OLECREATE(CShellExt, STR_EXT_TITLE, 0x5f820ca1, 0x3dde, 0x11db, 0xb2, 0xce, 0x0, 0x15, 0x58, 0x09, 0x2d, 0xb5)
#endif


/////////////////////////////////////////////////////////////////////////////
// CShellExt message handlers
/////////////////////////////////////////////////////////////////////////////


/////////////////////////////////////////////////////////////////////////////
// IUnknown for IContextMenu
/////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CShellExt::XMenuExt::QueryInterface(REFIID riid, void** ppv)
{
    METHOD_PROLOGUE(CShellExt, MenuExt);

    return pThis->ExternalQueryInterface(&riid, ppv);
}

STDMETHODIMP_(ULONG) CShellExt::XMenuExt::AddRef(void)
{
    return ++nCMRefCount;
}

STDMETHODIMP_(ULONG) CShellExt::XMenuExt::Release(void)
{
    if (nCMRefCount > 0)
	nCMRefCount--;

    return nCMRefCount;
}

/////////////////////////////////////////////////////////////////////////////
// IConextMenu Functions
/////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CShellExt::XMenuExt::QueryContextMenu(HMENU hMenu,UINT indexMenu,
    UINT idCmdFirst, UINT idCmdLast,UINT uFlags)
{
    METHOD_PROLOGUE(CShellExt, MenuExt);

    // Don't add any menu items if we're being asked to deal with this file as a shortcut.
    if (uFlags & CMF_VERBSONLY)
	return MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL, (USHORT)0);

    // Check to see if there's already an AFS menu here; if so, remove it
    int nItemsNow = GetMenuItemCount (hMenu);
    CString strAfsItemText = GetMessageString(IDS_AFS_ITEM);
    LPCTSTR pszAfsItemText = (LPCTSTR)strAfsItemText;
    for (int iItem = 0; iItem < nItemsNow; iItem++) {
	TCHAR szItemText[256];
	if (!GetMenuString (hMenu, iItem, szItemText, 256, MF_BYPOSITION))
	    continue;
	if (!lstrcmp (szItemText, pszAfsItemText)) {
	    DeleteMenu (hMenu, iItem, MF_BYPOSITION);
	    continue;
	}
	if ((!lstrcmp(szItemText,"&Delete"))&&(pThis->m_bIsSymlink)) {	/*this is a symlink - don't present a delete menu!*/
	    DeleteMenu (hMenu, iItem, MF_BYPOSITION);
	    continue;
	}
	if ((!lstrcmp(szItemText,"Cu&t"))&&(pThis->m_bIsSymlink)) {		/*same for cut*/
	    DeleteMenu (hMenu, iItem, MF_BYPOSITION);
	    continue;
	}
    }
    int indexShellMenu = 0;

    // Create the AFS submenu using the allowed ID's.
    HMENU hAfsMenu = CreatePopupMenu();
    int indexAfsMenu = 0;

    // The Authentication item has been removed from the AFS menu because
    // there is now a tray icon to handle authentication.
    //
    //::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_AUTHENTICATION, GetMessageString(IDS_AUTHENTICATION_ITEM));

    // Only enable the ACL menu item if a single directory is selected
    int nSingleDirOnly = MF_GRAYED;
    if (pThis->m_bDirSelected && (pThis->m_astrFileNames.GetSize() == 1))
	nSingleDirOnly = MF_ENABLED;
    ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION | nSingleDirOnly, idCmdFirst + IDM_ACL_SET, GetMessageString(IDS_ACLS_ITEM));

    // Volume/Partition submenu of the AFS submenu
    HMENU hVolPartMenu = CreatePopupMenu();
    int indexVolPartMenu = 0;
    ::InsertMenu(hVolPartMenu, indexVolPartMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_VOLUME_PROPERTIES, GetMessageString(IDS_VOL_PART_PROPS_ITEM));
    ::InsertMenu(hVolPartMenu, indexVolPartMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_VOLUMEPARTITION_UPDATENAMEIDTABLE, GetMessageString(IDS_VOL_PART_REFRESH_ITEM));
    ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION | MF_POPUP, (UINT)hVolPartMenu, GetMessageString(IDS_VOL_PART_ITEM));

    // Mount Point submenu of the AFS submenu
    HMENU hMountPointMenu = CreatePopupMenu();
    int indexMountPointMenu = 0;
    int nMountPointSelected = MF_GRAYED;
    for (int n = pThis->m_astrFileNames.GetSize() - 1 ; n >= 0; n--) {
	if ( IsMountPoint(pThis->m_astrFileNames[n]) ) {
	    nMountPointSelected = MF_ENABLED;
	    break;
	}
    }
    ::InsertMenu(hMountPointMenu, indexMountPointMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_MOUNTPOINT_SHOW, GetMessageString(IDS_MP_SHOW_ITEM));
    ::InsertMenu(hMountPointMenu, indexMountPointMenu++, MF_STRING | MF_BYPOSITION | nMountPointSelected, idCmdFirst + IDM_MOUNTPOINT_REMOVE, GetMessageString(IDS_MP_REMOVE_ITEM));
    ::InsertMenu(hMountPointMenu, indexMountPointMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_MOUNTPOINT_MAKE, GetMessageString(IDS_MP_MAKE_ITEM));
    ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION | MF_POPUP, (UINT)hMountPointMenu, GetMessageString(IDS_MOUNT_POINT_ITEM));

    ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_FLUSH, GetMessageString(IDS_FLUSH_FILE_DIR_ITEM));	
    ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_FLUSH_VOLUME, GetMessageString(IDS_FLUSH_VOLUME_ITEM));
    ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_SHOW_SERVER, GetMessageString(IDS_SHOW_FILE_SERVERS_ITEM));
    ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_SHOWCELL, GetMessageString(IDS_SHOW_CELL_ITEM));
    ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_SERVER_STATUS, GetMessageString(IDS_SHOW_SERVER_STATUS_ITEM));

    HMENU hSymbolicMenu = CreatePopupMenu();
    int indexSymbolicMenu = 0;
    ::InsertMenu(hSymbolicMenu, indexSymbolicMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_SYMBOLICLINK_ADD, GetMessageString(IDS_SYMBOLICLINK_ADD));
    // ::InsertMenu(hSymbolicMenu, indexSymbolicMenu, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_SYMBOLICLINK_EDIT, GetMessageString(IDS_SYMBOLICLINK_EDIT));
    // ::EnableMenuItem(hSymbolicMenu,indexSymbolicMenu++,((pThis->m_bIsSymlink)?MF_ENABLED:MF_GRAYED)|MF_BYPOSITION);
    ::InsertMenu(hSymbolicMenu, indexSymbolicMenu, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_SYMBOLICLINK_REMOVE, GetMessageString(IDS_SYMBOLICLINK_REMOVE));
    ::EnableMenuItem(hSymbolicMenu,indexSymbolicMenu++,((pThis->m_bIsSymlink)?MF_ENABLED:MF_GRAYED)|MF_BYPOSITION);
    ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION | MF_POPUP, (UINT)hSymbolicMenu, GetMessageString(IDS_SYMBOLIC_LINK_ITEM));

    // The Submounts menu has been removed because the AFS tray icon
    // and control panel now support mapping drives directly to an AFS
    // path.
    //
    // HMENU hSubmountMenu = CreatePopupMenu();
    // int indexSubmountMenu = 0;
    // ::InsertMenu(hSubmountMenu, indexSubmountMenu++, MF_STRING | MF_BYPOSITION | nSingleDirOnly, idCmdFirst + IDM_SUBMOUNTS_CREATE, GetMessageString(IDS_SUBMOUNTS_CREATE_ITEM));
    // ::InsertMenu(hSubmountMenu, indexSubmountMenu++, MF_STRING | MF_BYPOSITION, idCmdFirst + IDM_SUBMOUNTS_EDIT, GetMessageString(IDS_SUBMOUNTS_EDIT_ITEM));
    // ::InsertMenu(hAfsMenu, indexAfsMenu++, MF_STRING | MF_BYPOSITION | MF_POPUP, (UINT)hSubmountMenu, GetMessageString(IDS_SUBMOUNTS_ITEM));

    // Add a separator
    ::InsertMenu (hMenu, indexMenu + indexShellMenu++, MF_STRING | MF_BYPOSITION | MF_SEPARATOR, 0, TEXT(""));

    // Add the AFS submenu to the shell's menu
    ::InsertMenu(hMenu, indexMenu + indexShellMenu++, MF_STRING | MF_BYPOSITION | MF_POPUP, (UINT)hAfsMenu, GetMessageString(IDS_AFS_ITEM));

    // Add a separator after us
    ::InsertMenu (hMenu, indexMenu + indexShellMenu++, MF_STRING | MF_BYPOSITION | MF_SEPARATOR, 0, TEXT(""));

    return MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL, 
			 (USHORT)indexAfsMenu + indexVolPartMenu + indexMountPointMenu + indexShellMenu + indexSymbolicMenu);
}	

STDMETHODIMP CShellExt::XMenuExt::InvokeCommand(LPCMINVOKECOMMANDINFO lpici)
{
    METHOD_PROLOGUE(CShellExt, MenuExt);

    if (HIWORD(lpici->lpVerb ))
        return E_FAIL;

    AddRef();

    CStringArray &files = pThis->m_astrFileNames;

    switch (LOWORD(lpici->lpVerb))
    {
    case IDM_AUTHENTICATION:	{
	CAuthDlg dlg;
	dlg.DoModal();
	break;
    }

    case IDM_ACL_SET:			{ 
	CSetAfsAcl dlg;
	ASSERT(files.GetSize() == 1);
	dlg.SetDir(files[0]);
	dlg.DoModal();
	break;
    }

    case IDM_VOLUME_PROPERTIES:	{
	CVolumeInfo dlg;
	dlg.SetFiles(files);
	dlg.DoModal();
	break;
    }

    case IDM_VOLUMEPARTITION_UPDATENAMEIDTABLE:
	CheckVolumes();
	break;

    case IDM_MOUNTPOINT_SHOW:	
	ListMount(files);
	break;

    case IDM_MOUNTPOINT_REMOVE:	{
	int nChoice = ShowMessageBox(IDS_REALLY_DEL_MOUNT_POINTS, MB_ICONQUESTION | MB_YESNO, IDS_REALLY_DEL_MOUNT_POINTS);
	if (nChoice == IDYES)
	    RemoveMount(files);
	break;
    }

    case IDM_MOUNTPOINT_MAKE:	{
	CMakeMountPointDlg dlg;
	ASSERT(files.GetSize() == 1);
	dlg.SetDir(files[0]);
	dlg.DoModal();
	break;
    }

    case IDM_FLUSH:				
	Flush(files);
	break;

    case IDM_FLUSH_VOLUME:		
	FlushVolume(files);
	break;

    case IDM_SHOW_SERVER:	       
	WhereIs(files);
	break;

    case IDM_SHOWCELL:
	WhichCell(files);
	break;

    case IDM_SERVER_STATUS: {
	CServerStatusDlg dlg;
	dlg.DoModal();
	break;
    }

        /*
	case IDM_SUBMOUNTS_EDIT:	{
	CSubmountsDlg dlg;
	dlg.DoModal();
	break;
	}
	case IDM_SUBMOUNTS_CREATE:	{
	ASSERT(files.GetSize() == 1);
	CSubmountsDlg dlg;
	dlg.SetAddOnlyMode(files[0]);
	dlg.DoModal();
	break;
	}
        */
    case IDM_SYMBOLICLINK_REMOVE: {
	if (files.GetSize()>1)
	    break;
	CString msg=files.GetAt(0);
	int i;
	if ((i=msg.ReverseFind('\\'))>0)
	    msg=msg.Left(i+1);
	else if ((i=msg.ReverseFind(':'))>0)
	    msg=msg.Left(i+1)+"\\";
	if (!SetCurrentDirectory(msg))
	{
	    MessageBeep((UINT)-1);
	    ShowMessageBox(IDS_UNABLE_TO_SET_CURRENT_DIRECTORY,MB_OK,IDS_UNABLE_TO_SET_CURRENT_DIRECTORY);
	    break;
	}
	msg=files.GetAt(0);
	if ((i=msg.ReverseFind('\\'))>0||((i=msg.ReverseFind(':'))>0))
	    msg=msg.Right(msg.GetLength()-i-1);
	int nChoice = ShowMessageBox(IDS_REALLY_REMOVE_SYMLINK, MB_ICONQUESTION | MB_YESNO, IDS_REALLY_REMOVE_SYMLINK,msg);
	if (nChoice == IDYES)
	    RemoveSymlink(files.GetAt(0));
	break;
    }

    case IDM_SYMBOLICLINK_ADD: {
	CString msg=files.GetAt(0);
	int i;
	if ((i=msg.ReverseFind('\\'))>0)
	    msg=msg.Left(i+1);
	else if ((i=msg.ReverseFind(':'))>0)
	    msg=msg.Left(i+1)+"\\";
	CMakeSymbolicLinkDlg dlg;
	dlg.Setbase(msg);
	dlg.DoModal();
	break;
    }
		
    case IDM_REMOVE_SYMLINK:	{
	if (files.GetSize()>1)
	    break;
	int nChoice = ShowMessageBox(IDS_REALLY_REMOVE_SYMLINK, MB_ICONQUESTION | MB_YESNO, IDS_REALLY_REMOVE_SYMLINK);
	if (nChoice == IDYES)
	    RemoveSymlink(files.GetAt(0));
	}	
	break;
    default:
	ASSERT(FALSE);
	Release();
	return E_INVALIDARG;
    }

    Release();

    return NOERROR;
}	

STDMETHODIMP CShellExt::XMenuExt::GetCommandString(UINT_PTR idCmd, UINT uType,
    UINT* pwReserved, LPSTR pszName, UINT cchMax)
{
    if (uType != GCS_HELPTEXT)
	return NOERROR;			// ?????????????????????????????????????????????????

    UINT nCmdStrID;

    AfxSetResourceHandle(theApp.m_hInstance);

    switch (idCmd)
    {
    case IDM_AUTHENTICATION: 
	nCmdStrID = ID_AUTHENTICATE;
	break;

    case IDM_ACL_SET: 
	nCmdStrID = ID_ACL_SET;
	break;

    case IDM_VOLUME_PROPERTIES:
	nCmdStrID = ID_VOLUME_PROPERTIES;
	break;

    case IDM_VOLUMEPARTITION_UPDATENAMEIDTABLE:	
	nCmdStrID = ID_VOLUMEPARTITION_UPDATENAMEIDTABLE;
	break;

    case IDM_MOUNTPOINT_SHOW:  
	nCmdStrID = ID_MOUNTPOINT_SHOW;
	break;

    case IDM_MOUNTPOINT_REMOVE:	
	nCmdStrID = ID_MOUNTPOINT_REMOVE;
	break;
		
    case IDM_MOUNTPOINT_MAKE: 
	nCmdStrID = ID_MOUNTPOINT_MAKE;
	break;

    case IDM_FLUSH:  
	nCmdStrID = ID_FLUSH;
	break;

    case IDM_FLUSH_VOLUME:   
	nCmdStrID = ID_VOLUME_FLUSH;
	break;

    case IDM_SHOW_SERVER: 
	nCmdStrID = ID_WHEREIS;
	break;

    case IDM_SHOWCELL:	
	nCmdStrID = ID_SHOWCELL;
	break;

    case IDM_SERVER_STATUS: 
	nCmdStrID = ID_SERVER_STATUS;
	break;

    case IDM_SYMBOLICLINK_ADD:
	nCmdStrID = ID_SYMBOLICLINK_ADD;
	break;
		
    case IDM_SYMBOLICLINK_REMOVE: 
	nCmdStrID = ID_SYMBOLICLINK_REMOVE;
	break;

    case IDM_REMOVE_SYMLINK:
	nCmdStrID= ID_REMOVE_SYMLINK;
	break;
		
    default:
	ASSERT(FALSE);
	Release();
	return E_INVALIDARG;
    }

    CString strMsg;
    LoadString (strMsg, nCmdStrID);

    strncpy(pszName, strMsg, cchMax);

    return NOERROR;
}

/////////////////////////////////////////////////////////////////////////////
// IUnknown for IShellExtInit
/////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CShellExt::XShellInit::QueryInterface(REFIID riid, void** ppv)
{
    METHOD_PROLOGUE(CShellExt, ShellInit);

    return pThis->ExternalQueryInterface(&riid, ppv);
}

STDMETHODIMP_(ULONG) CShellExt::XShellInit::AddRef(void)
{
    return ++nSERefCount;
}

STDMETHODIMP_(ULONG) CShellExt::XShellInit::Release(void)
{
    if (nSERefCount > 0)
	nSERefCount--;
	
    return nSERefCount;
}

/////////////////////////////////////////////////////////////////////////////
// IShellInit Functions
/////////////////////////////////////////////////////////////////////////////
STDMETHODIMP CShellExt::XShellInit::Initialize(LPCITEMIDLIST pidlFolder, IDataObject *pdobj, HKEY hkeyProgID)
{
    METHOD_PROLOGUE(CShellExt, ShellInit);

    HRESULT hres = E_FAIL;
    FORMATETC fmte = {CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
    STGMEDIUM medium;

    // We must have a data object
    if (pdobj == NULL)
	    return E_FAIL;

    //  Use the given IDataObject to get a list of filenames (CF_HDROP)
    hres = pdobj->GetData(&fmte, &medium);
    if (FAILED(hres)) {
	return E_FAIL;
    }

    int nNumFiles = DragQueryFile((HDROP)medium.hGlobal, 0xFFFFFFFF, NULL, 0);
    if (nNumFiles == 0)
	hres = E_FAIL;
    else {
	pThis->m_bDirSelected = FALSE;

	for (int ii = 0; ii < nNumFiles; ii++) {
	    CString strFileName;

	    // Get the size of the file name string
	    int nNameLen = DragQueryFile((HDROP)medium.hGlobal, ii, 0, 0);

	    // Make room for it in our string object
	    LPTSTR pszFileNameBuf = strFileName.GetBuffer(nNameLen + 1);	// +1 for the terminating NULL
	    ASSERT(pszFileNameBuf);

	    // Get the file name
	    DragQueryFile((HDROP)medium.hGlobal, ii, pszFileNameBuf, nNameLen + 1);

	    strFileName.ReleaseBuffer();

	    if (!IsPathInAfs(strFileName)) {
		pThis->m_astrFileNames.RemoveAll();
		break;
	    } else {
		pThis->m_bIsSymlink=IsSymlink(strFileName);
	    }

	    if (IsADir(strFileName))
		pThis->m_bDirSelected = TRUE;

	    pThis->m_astrFileNames.Add(strFileName);
	}

	if (pThis->m_astrFileNames.GetSize() > 0)
	    hres = NOERROR;
	else
	    hres = E_FAIL;
    }
 
    //	Release the data
    ReleaseStgMedium(&medium);

    return hres;
}

STDMETHODIMP CShellExt::XIconExt::QueryInterface(REFIID riid, void** ppv)
{
    METHOD_PROLOGUE(CShellExt, IconExt);
    return pThis->ExternalQueryInterface(&riid, ppv);
}

STDMETHODIMP_(ULONG) CShellExt::XIconExt::AddRef(void)
{
    return ++nICRefCount;
}

STDMETHODIMP_(ULONG) CShellExt::XIconExt::Release(void)
{
    if (nICRefCount > 0)
	nICRefCount--;

    return nICRefCount;
}	


/////////////////////////////////////////////////////////////////////////////
// IIconHandler Functions
/////////////////////////////////////////////////////////////////////////////

STDMETHODIMP CShellExt::XIconExt::GetOverlayInfo(LPWSTR pwszIconFile
	,int cchMax,int* pIndex,DWORD* pdwFlags)
{
    if(IsBadWritePtr(pIndex, sizeof(int)))
	return E_INVALIDARG;
    if(IsBadWritePtr(pdwFlags, sizeof(DWORD)))
	return E_INVALIDARG;

    HMODULE hModule=GetModuleHandle("shell32.dll");
    TCHAR szModule[MAX_PATH];
    DWORD z=GetModuleFileName(hModule,szModule,sizeof(szModule));
    MultiByteToWideChar( CP_ACP,0,szModule,-1,pwszIconFile,cchMax); 
    *pIndex = 30;
    *pdwFlags = ISIOI_ICONFILE | ISIOI_ICONINDEX;
    return S_OK;
}

STDMETHODIMP CShellExt::XIconExt::GetPriority(int* pPriority)
{
    if(IsBadWritePtr(pPriority, sizeof(int)))
	return E_INVALIDARG;
    *pPriority = 0;
    return S_OK;
}

STDMETHODIMP CShellExt::XIconExt::IsMemberOf(LPCWSTR pwszPath,DWORD dwAttrib)
{
    TCHAR szPath[MAX_PATH];
    WideCharToMultiByte( CP_ACP,0,pwszPath,-1,szPath,MAX_PATH,NULL,NULL);
    if (IsSymlink(szPath))
	return S_OK;
    return S_FALSE;
}	

/*  TOOL TIP INFO IMPLIMENTION   */

STDMETHODIMP CShellExt::XToolTipExt::QueryInterface(REFIID riid, void** ppv)
{
    METHOD_PROLOGUE(CShellExt, ToolTipExt);
    return pThis->ExternalQueryInterface(&riid, ppv);
}

STDMETHODIMP_(ULONG) CShellExt::XToolTipExt::AddRef(void)
{
    return ++nTPRefCount;
}

STDMETHODIMP_(ULONG) CShellExt::XToolTipExt::Release(void)
{
    if (nTPRefCount> 0)
	nTPRefCount--;

    return nTPRefCount;
}

STDMETHODIMP CShellExt::XToolTipExt::GetInfoTip(DWORD dwFlags, LPWSTR *ppwszTip)
{
    METHOD_PROLOGUE(CShellExt, ToolTipExt);

    if (!IsSymlink(pThis->m_szFile))
    {
	ppwszTip=NULL;
	return S_OK;
    }
    USES_CONVERSION;
    // dwFlags is currently unused.
    *ppwszTip = (WCHAR*) (pThis->m_pAlloc)->Alloc((1+lstrlen(pThis->m_szFile))*sizeof(WCHAR));
    if (*ppwszTip)
    {
	wcscpy(*ppwszTip, (WCHAR*)T2OLE(pThis->m_szFile));
    }

    return S_OK;
}
STDMETHODIMP CShellExt::XToolTipExt::GetInfoFlags(LPDWORD pdwFlags)
{
    return S_OK;
}

//////////                          IPersistFile
///////                            PersistFileExt

STDMETHODIMP CShellExt::XPersistFileExt::QueryInterface(REFIID riid, void** ppv)
{
    METHOD_PROLOGUE(CShellExt, PersistFileExt);
    return pThis->ExternalQueryInterface(&riid, ppv);
}

STDMETHODIMP_(ULONG) CShellExt::XPersistFileExt::AddRef(void)
{
    return ++nXPRefCount;
}

STDMETHODIMP_(ULONG) CShellExt::XPersistFileExt::Release(void)
{
    if (nXPRefCount> 0)
	nXPRefCount--;

    return nXPRefCount;
}

STDMETHODIMP	CShellExt::XPersistFileExt::Load(LPCOLESTR wszFile, DWORD dwMode)
{
    METHOD_PROLOGUE(CShellExt, PersistFileExt);
    USES_CONVERSION;
    _tcscpy(pThis->m_szFile, OLE2T((WCHAR*)wszFile)); 
    return S_OK;	
}

STDMETHODIMP CShellExt::XPersistFileExt::GetClassID(LPCLSID)
{ 
    return E_NOTIMPL;	
}

STDMETHODIMP CShellExt::XPersistFileExt::IsDirty(VOID)
{ 
    return E_NOTIMPL; 
}

STDMETHODIMP CShellExt::XPersistFileExt::Save(LPCOLESTR, BOOL)
{ 
    return E_NOTIMPL; 
}

STDMETHODIMP CShellExt::XPersistFileExt::SaveCompleted(LPCOLESTR)
{ 
    return E_NOTIMPL; 
}

STDMETHODIMP CShellExt::XPersistFileExt::GetCurFile(LPOLESTR FAR*)
{ 
    return E_NOTIMPL; 
}
