系统编程

开发平台：

Visual C++

enum.h：源码内容

							#ifndef __enum_h
#define __enum_h
/*-----------------------------------------------------------------------------
/ CDsEnum
/----------------------------------------------------------------------------*/
#define MAX_DSSHELL_ENUM    64
class CMyDocsEnum : public IEnumIDList, CUnknown
{
    private:
        HWND            m_hwndOwner;                // used for MsgBox etc
        ULONG           m_cFetched;                 // number of items previously fetched
        LPITEMIDLIST    m_pidlRoot;                 // pidl to root of real folder we're enumerating...
        IShellFolder *  m_psf;                      // real shell folder for this folder
        IEnumIDList  *  m_peidl;                    // real enumerator for this folder
        BOOL            m_bRoot;                    // Is this the root MyDocs folder
        HDPA            m_hidl;                     // array of special pidls
    private:
        VOID _GetSpecialItems( HKEY hkey );
    public:
        CMyDocsEnum(IShellFolder * psf, HWND hwndOwner, DWORD grfFlags, LPITEMIDLIST pidlRoot, BOOL bRoot );
        ~CMyDocsEnum();
        VOID DoFirstTimeInitialization( );
        LPITEMIDLIST FindSpecialItem( LPTSTR pName );
        // IUnknown
        STDMETHOD(QueryInterface)(REFIID riid, LPVOID* ppvObject);
        STDMETHOD_(ULONG, AddRef)();
        STDMETHOD_(ULONG, Release)();
        // IEnumIDList
        STDMETHODIMP Next(ULONG celt, LPITEMIDLIST* rgelt, ULONG* pceltFetched);
        STDMETHODIMP Skip(ULONG celt);
        STDMETHODIMP Reset();
        STDMETHODIMP Clone(LPENUMIDLIST* ppenum);
};
#endif

						