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ExtractIcon.h：源码内容

							#if !defined(AFX_EXTRACTICON_H__20001226_57EC_56A4_0219_0080AD509054__INCLUDED_)
#define AFX_EXTRACTICON_H__20001226_57EC_56A4_0219_0080AD509054__INCLUDED_
#pragma once
//////////////////////////////////////////////////////////////////////////////
// CExtractIcon
template< class T >
class ATL_NO_VTABLE CExtractIcon : 
   public CComObjectRootEx<CComSingleThreadModel>,
   public IExtractIcon
{
public:
DECLARE_NOT_AGGREGATABLE(CExtractIcon)
BEGIN_COM_MAP(CExtractIcon)
   COM_INTERFACE_ENTRY_IID(IID_IExtractIcon,IExtractIcon)
END_COM_MAP()
   CPidl m_pPidl;
   HRESULT _Init(LPCITEMIDLIST pidl)
   {
      m_pPidl.Copy(CPidl::_GetLastItem(pidl));
      return S_OK;
   }
   // IExtractIcon
   STDMETHOD(GetIconLocation)(UINT uFlags, 
                              LPTSTR /*szIconFile*/, 
                              UINT /*cchMax*/, 
                              LPINT piIndex, 
                              LPUINT puFlags)
   {
      ATLASSERT(piIndex);
      ATLASSERT(puFlags);
      if( m_pPidl.IsEmpty() ) return E_FAIL;
      T *pData = reinterpret_cast<T *>((LPITEMIDLIST)m_pPidl);
      if( pData!=NULL ) {
         switch( pData->type ) {
         case PT_FOLDER:
            *piIndex = (uFlags & GIL_OPENICON)==0 ? ICON_INDEX_FOLDER : ICON_INDEX_FOLDER_OPEN;
            *puFlags = GIL_NOTFILENAME;
            break;
         default:
            *piIndex = ICON_INDEX_FILE;
            *puFlags = GIL_NOTFILENAME;
            break;
         }
      }
      return S_OK;
   }
   STDMETHOD(Extract)(LPCTSTR /*pstrName*/, 
                      UINT nIconIndex, 
                      HICON *phiconLarge, 
                      HICON *phiconSmall, 
                      UINT /*nIconSize*/)
   {
      ATLASSERT(phiconLarge);
      ATLASSERT(phiconSmall);
      *phiconLarge = ImageList_GetIcon(_Module.m_ImageLists.m_hImageListLarge, nIconIndex, ILD_TRANSPARENT);
      *phiconSmall = ImageList_GetIcon(_Module.m_ImageLists.m_hImageListSmall, nIconIndex, ILD_TRANSPARENT);
      return S_OK;
   };
};
#endif // !defined(AFX_EXTRACTICON_H__20001226_57EC_56A4_0219_0080AD509054__INCLUDED_)

						