系统文件夹路径的系统宏定义

Const CSIDL_ADMINTOOLS As Long = &H30                '（用户）开始菜单程序系统管理工具
Const CSIDL_ALTSTARTUP As Long = &H1D                '未本地化的启动
Const CSIDL_APPDATA As Long = &H1A                   '（用户）应用程序的数据
Const CSIDL_BITBUCKET As Long = &HA                  '（桌面）回收站
Const CSIDL_CONTROLS As Long = &H3                   '我的电脑控制面板
Const CSIDL_COOKIES As Long = &H21
Const CSIDL_DESKTOP As Long = &H0                    '桌面
Const CSIDL_DESKTOPDIRECTORY As Long = &H10          '（用户）桌面
Const CSIDL_FAVORITES As Long = &H6                  '（用户）个性化设置
Const CSIDL_FONTS As Long = &H14                     'windows字体
Const CSIDL_HISTORY As Long = &H22
Const CSIDL_INTERNET As Long = &H1                   'IE（桌面上的图标
Const CSIDL_INTERNET_CACHE As Long = &H20            '因特网缓存文件夹
Const CSIDL_LOCAL_APPDATA     As Long = &H1C            '（用户）本地设置应用程序数据
Const CSIDL_DRIVES As Long = &H11                    '我的电脑
Const CSIDL_MYPICTURES As Long = &H27                'C:Program FilesMy Pictures
Const CSIDL_NETHOOD As Long = &H13                   '（用户）网上邻居中的元素
Const CSIDL_NETWORK As Long = &H12                   '网上邻居
Const CSIDL_PRINTERS As Long = &H4                   '我的电脑打印机
Const CSIDL_PRINTHOOD As Long = &H1B                 '（用户）打印机连接
Const CSIDL_PERSONAL As Long = &H5                   '我的文档
Const CSIDL_PROGRAM_FILES As Long = &H26             'C:Program Files
Const CSIDL_PROGRAM_FILESX86 As Long = &H2A          'x86 apps (Alpha)的程序文件目录
Const CSIDL_PROGRAMS As Long = &H2                   '开始菜单程序
Const CSIDL_PROGRAM_FILES_COMMON As Long = &H2B      'Program FilesCommon
Const CSIDL_PROGRAM_FILES_COMMONX86 As Long = &H2C 'RISC上的x86 Program FilesCommon
Const CSIDL_RECENT As Long = &H8                     '(用户)最近记录目录
Const CSIDL_SENDTO As Long = &H9                     '(用户)发送到目录
Const CSIDL_STARTMENU As Long = &HB                  '(用户)开始菜单
Const CSIDL_STARTUP As Long = &H7                    '开始菜单程序启动
Const CSIDL_SYSTEM As Long = &H25                    'system文件夹
Const CSIDL_SYSTEMX86 As Long = &H29                 'x86 apps (Alpha)的system文件夹
Const CSIDL_TEMPLATES As Long = &H15
Const CSIDL_PROFILE As Long = &H28                   '用户概貌文件夹
Const CSIDL_WINDOWS As Long = &H24                   'Windows目录或SYSROOT()
Const CSIDL_COMMON_ADMINTOOLS As Long = &H2F         '（所有用户）开始菜单程序系统管理工具
Const CSIDL_COMMON_ALTSTARTUP As Long = &H1E         '未本地化的通用启动
Const CSIDL_COMMON_APPDATA As Long = &H23            '（所有用户）应用程序数据
Const CSIDL_COMMON_DESKTOPDIRECTORY As Long = &H19 '（所有用户）桌面
Const CSIDL_COMMON_DOCUMENTS As Long = &H2E          '（所有用户）文档
Const CSIDL_COMMON_FAVORITES As Long = &H1F          '(所有用户)设置
Const CSIDL_COMMON_PROGRAMS As Long = &H17           '(所有用户)程序
Const CSIDL_COMMON_STARTMENU As Long = &H16          '(所有用户)开始菜单
Const CSIDL_COMMON_STARTUP As Long = &H18            '(所有用户)启动
Const CSIDL_COMMON_TEMPLATES As Long = &H2D          '(所有用户)临时

#include <shlobj.h>
#include <shlwapi.h>
#include <windows.h>
#include <stdio.h>

void main(void)
{
    char DataDir[MAX_PATH];
    int len;
    memset(DataDir, 0, sizeof(DataDir));
    if (SUCCEEDED(SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL, 0, DataDir)))
        PathAppendA(DataDir, "XXXX\XXXX.txt");   //  DataDirXXXXXXXX.txt  表示路劲
    else 
        return -1;
    len = strlen(DataDir);
    argv[5] = (char*) malloc(strlen(DataDir)); // argv[5] 为自己定义的的变量指针
    memset(argv[5], 0, strlen(DataDir));
    strcpy(argv[5], DataDir);

}