C++选择文件夹代码的封装

#include <Shlobj.h>  

class CDirDialog 
{ 
protected: 
    BROWSEINFO m_bi; 
    char m_szDisplayName[MAX_PATH]; //显示名称 
    char m_szPath[MAX_PATH]; //选择的目录 
 
public: 
    //显示对话框 
    BOOL DoBrowse(HWND hwndOwner, LPTSTR pszDisplayName); 
 
    LPCTSTR GetPath(){return m_szPath;}; 
 
    CDirDialog(void); 
    ~CDirDialog(void); 
}; 
 
#endif

CDirDialog::CDirDialog(void) 
{ 
    ::ZeroMemory((void*)&m_bi, sizeof(BROWSEINFO)); 
    memset(m_szDisplayName, 0, MAX_PATH); 
    memset(m_szPath, 0, MAX_PATH); 
    m_bi.hwndOwner = NULL; 
    m_bi.pidlRoot = NULL; 
    m_bi.lpszTitle = "请选择文件夹"; 
    m_bi.ulFlags = BIF_RETURNONLYFSDIRS ; 
    m_bi.lpfn = NULL; 
    m_bi.lParam = NULL; 
    m_bi.iImage = NULL; 
} 
 
BOOL CDirDialog::DoBrowse(HWND hwndOwner, LPTSTR pszTitle) 
{ 
    m_bi.hwndOwner = hwndOwner; 
    m_bi.lpszTitle = pszTitle; 
    PIDLIST_ABSOLUTE pItem = ::SHBrowseForFolderA(&m_bi); 
    if (pItem != NULL) 
    { 
        ::SHGetPathFromIDListA(pItem, m_szPath); 
        return TRUE; 
    } 
     
    return FALSE; 
} 
 
CDirDialog::~CDirDialog(void) 
{ 
}