VC获取操作系统特殊路径的方法
BOOL SHGetSpecialFolderPath （ HWND hwndOwner, LPTSTR lpszPath, int nFolder, BOOL fCreate）；
hwndOwner :用GetDesktopWindow API取一个窗口句柄。
lpszPath:返回的路径
nFolder:标识代号
fCreate:true :如果文件夹不存在则创建，false:不创建
lpszPath和nFolder对应关系：
nFolder lpszPath
0 C:/Documents and Settings/当前用户/桌面
2 C:/Documents and Settings/当前用户/「开始」菜单/程序
5 C:/Documents and Settings/当前用户/My Documents
6 C:/Documents and Settings/当前用户/Favorites
7 C:/Documents and Settings/当前用户/「开始」菜单/程序/启动
8 C:/Documents and Settings/当前用户/Recent
9 C:/Documents and Settings/当前用户/SendTo
11 C:/Documents and Settings/当前用户/「开始」菜单
13 C:/Documents and Settings/当前用户/My Documents/My Music
14 C:/Documents and Settings/当前用户/My Documents/My Videos
16 C:/Documents and Settings/当前用户/桌面
19 C:/Documents and Settings/当前用户/NetHood
20 C:/WINDOWS/Fonts
21 C:/Documents and Settings/当前用户/Templates
22 C:/Documents and Settings/All Users/「开始」菜单
23 C:/Documents and Settings/All Users/「开始」菜单/程序
24 C:/Documents and Settings/All Users/「开始」菜单/程序/启动
25 C:/Documents and Settings/All Users/桌面
26 C:/Documents and Settings/当前用户/Application Data
27 C:/Documents and Settings/当前用户/PrintHood
28 C:/Documents and Settings/当前用户/Local Settings/Application Data
31 C:/Documents and Settings/All Users/Favorites
32 C:/Documents and Settings/当前用户/Local Settings/Temporary Internet Files
33 C:/Documents and Settings/当前用户/Cookies
34 C:/Documents and Settings/当前用户/Local Settings/History
35 C:/Documents and Settings/All Users/Application Data
36 C:/WINDOWS
37 C:/WINDOWS/system32
38 C:/Program Files
39 C:/Documents and Settings/当前用户/My Documents/My Pictures
40 C:/Documents and Settings/当前用户
43 C:/Program Files/Common Files
45 C:/Documents and Settings/All Users/Templates
46 C:/Documents and Settings/All Users/Documents
47 C:/Documents and Settings/All Users/「开始」菜单/程序/管理工具
48 C:/Documents and Settings/当前用户/「开始」菜单/程序/管理工具
53 C:/Documents and Settings/All Users/Documents/My Music
54 C:/Documents and Settings/All Users/Documents/My Pictures
55 C:/Documents and Settings/All Users/Documents/My Videos
56 C:/WINDOWS/resources
59 C:/Documents and Settings/当前用户/Local Settings/Application Data/Microsoft/CD Burning