DlgDirList

 TCHAR path[MAX_PATH ]= {0};
 _tcscpy_s(path, MAX_PATH, _T("C://"));

 DlgDirList(path, IDC_LIST2, 0, DDL_EXCLUSIVE |
  　　　　DDL_DIRECTORY);

1.path这里不要用L"c://"这种形式，因为

lpPathSpec

       Points to a null-terminated string that contains the path or filename. DlgDirList modifies this string, which should be long enough to contain the modifications.

　　临时对象，指针真的很危险

2.DDL_EXCLUSIVE 要想只显示目录，这个参数要加上