SHGetSpecialFolderLocation是一个计算机函数，函数原型为，功能为File system directory。

WINSHELLAPI HRESULT WINAPI SHGetSpecialFolderLocation( HWND hwndOwner, int nFolder, LPITEMIDLIST *ppidl); Retrieves the PIDL of a special folder. Returns NOERROR if successful, or an OLE-defined error result otherwise.hwndOwnerHandle to the owner window the client should specify if it displays a dialog box or message box.nFolderValue specifying the folder for which to retrieve the location. This parameter can be one of the following values:

ppidlAddress of a pointer to an item identifier list specifying the folder's location relative to the root of the namespace (the desktop). The calling application is responsible for freeing this pointer with the shell'sIMallocinterface (seeSHGetMalloc). See alsoSHGetSpecialFolderPath

WINSHELLAPI HRESULT WINAPI SHGetSpecialFolderLocation (HWND hwndOwner, int nFolder,LPITEMIDLIST * ppidl); //函数声明

nFolder: 是一个整数id，决定哪个目录是待查找目录,它的取值可能是

CSIDL_BITBUCKET回收站

CSIDL_CONTROLS控制面板

CSIDL_DESKTOP Windows桌面desktop;

CSIDL_DESKTOPDIRECTORY desktop的目录；

CSIDL_DRIVES我的电脑

CSIDL_FONTS 字体目录

CSIDL_NETHOOD网上邻居

CSIDL_NETWORK 网上邻居virtual folder

CSIDL_PERSONAL我的文档

CSIDL_PRINTERS 打印机

CSIDL_PROGRAMS 程序组

CSIDL_RECENT 最近打开文档

CSIDL_SENDTO 发送到菜单项

CSIDL_STARTMENU 快启菜单(开始菜单)

CSIDL_STARTUP 启动目录

CSIDL_TEMPLATES 临时文档

ppidl: pidl地址. SHGetSpecialFolderLocation把地址写到pidl.

Requirements