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
Files\My 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
Files\Common
Const CSIDL_PROGRAM_FILES_COMMONX86 As Long = &H2C
‘RISC上的x86 \Program Files\Common
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");   //  DataDir\XXXX\XXXX.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);

}