I'm responding in English as I don't speak German.
And the Google Translate didn't quite make it clear what you are discussing.
But if you are looking for user's document folder in Windows, here's the code I use from Visual Basic (just common APIs):
(It's pretty old code, but it still works for at least XP, if not a Google search for the new equivalent should be easy)
Public Enum enFolderSpecial
enDESKTOP = &H0
enINTERNET = &H1
enPROGRAMS = &H2 ' Contains the user's program groups (which are also file system directories). A common path is C:\WINNT\Profiles\username\Start Menu\Programs.
enCONTROLS = &H3
enPRINTERS = &H4
enPERSONAL = &H5 ' Serves as a common repository for documents. A common path is C:\WINNT\Profiles\username\My Documents.
enFAVORITES = &H6 ' Serves as a common repository for the user's favorite items. A common path is C:\WINNT\Profiles\username\Favorites.
enSTARTUP = &H7 ' Corresponds to the user's Startup program group. The system starts these programs whenever any user logs onto Windows NT or starts Windows® 95. A common path is C:\WINNT\Profiles\username\Start Menu\Programs\Startup.
enRECENT = &H8 ' Contains the user's most recently used documents. A common path is C:\WINNT\Profiles\username\Recent. To create a shortcut in this folder, use SHAddToRecentDocs. In addition to creating the shortcut, this function updates the shell's list of recent documents and adds the shortcut to the Documents submenu of the Start menu.
enSENDTO = &H9 ' Contains Send To menu items. A common path is c:\WINNT\Profiles\username\SendTo.
enBITBUCKET = &HA ' Virtual folder containing the objects in the user's Recycle Bin.
enSTARTMENU = &HB ' Containing Start menu items. A common path is c:\WINNT\Profiles\username\Start Menu.
enDESKTOPDIRECTORY = &H10 ' Contains files and folders that appear on the desktop for all users. A common path is C:\WINNT\Profiles\All Users\Desktop. Valid only for Windows NT systems.
enDRIVES = &H11
enNETWORK = &H12
enNETHOOD = &H13
enFONTS = &H14 ' Virtual folder containing fonts. A common path is C:\WINNT\Fonts.
enTEMPLATES = &H15 ' Serves as a common repository for document templates.
enCOMMON_STARTMENU = &H16 ' Contains the programs and folders that appear on the Start menu for all users. A common path is C:\WINNT\Profiles\All Users\Start Menu. Valid only for Windows NT systems.
enCOMMON_PROGRAMS = &H17 ' Contains the directories for the common program groups that appear on the Start menu for all users. A common path is c:\WINNT\Profiles\All Users\Start Menu\Programs. Valid only for Windows NT systems.
enCOMMON_STARTUP = &H18 ' Contains the programs that appear in the Startup folder for all users. A common path is C:\WINNT\Profiles\All Users\Start Menu\Programs\Startup. Valid only for Windows NT systems.
enCOMMON_DESKTOPDIRECTORY = &H19 ' Used to physically store file objects on the desktop (not to be confused with the desktop folder itself). A common path is C:\WINNT\Profiles\username\Desktop
enAPPDATA = &H1A ' Serves as a common repository for application-specific data. A common path is C:\WINNT\Profiles\username\Application Data.
enPRINTHOOD = &H1B
enLOCAL_APPDATA = &H1C ' Version 5.0. File system directory that serves as a data repository for local (non-roaming) applications. A common path is C:\WINNT\Profiles\username\Local Settings\Application Data.
enALTSTARTUP = &H1D ' Corresponds to the user's nonlocalized Startup program group. (All Users\Startup?)
enCOMMON_ALTSTARTUP = &H1E ' Corresponds to the nonlocalized Startup program group for all users. Valid only for Windows NT systems.
enCOMMON_FAVORITES = &H1F ' Serves as a common repository for all users' favorite items. Valid only for Windows NT systems.
enINTERNET_CACHE = &H20
enCOOKIES = &H21 ' Serves as a common repository for Internet cookies. A common path is C:\WINNT\Profiles\username\Cookies.
enHISTORY = &H22 ' Serves as a common repository for Internet history items.
enCOMMON_APPDATA = &H23 ' Version 5.0. Application data for all users. A common path is C:\WINNT\Profiles\All Users\Application Data.
enWINDOWS = &H24 ' Version 5.0. Windows directory or SYSROOT. This corresponds to the %windir% or %SYSTEMROOT% environment variables. A common path is C:\WINNT.
enSYSTEM = &H25 ' Version 5.0. System folder. A common path is C:\WINNT\SYSTEM32.
enPROGRAM_FILES = &H26 ' Version 5.0. Program Files folder. A common path is C:\Program Files.
enPROGRAM_FILES_COMMON = &H2B ' Version 5.0. A folder for components that are shared across applications. A common path is C:\Program Files\Common. Valid only for Windows NT and Windows® 2000 systems.
enCOMMON_TEMPLATES = &H2D ' Contains the templates that are available to all users. A common path is C:\WINNT\Profiles\All Users\Templates. Valid only for Windows NT systems.
enCOMMON_DOCUMENTS = &H2E ' Contains documents that are common to all users. A common path is C:\WINNT\Profiles\All Users\Documents. Valid only for Windows NT systems.
End Enum
Private Declare Function SHGetSpecialFolderPath Lib "shell32.dll" Alias "SHGetSpecialFolderPathA" (ByVal hWnd As Long, ByVal lpszPath As String, ByVal nFolder As Integer, ByVal fCreate As Boolean) As Boolean
Public Function File_FolderGet_Special(enFolderID As enFolderSpecial) As String
Dim bReturn As Long
Dim sBuffer As String
File_FolderGet_Special = ""
sBuffer = Space(255)
bReturn = SHGetSpecialFolderPath(0, sBuffer, enFolderID, False)
sBuffer = Left(sBuffer, InStr(sBuffer, Chr(0)) - 1)
File_FolderGet_Special = sBuffer
End Function
Usage:
Dim documents_folder As String
documents_folder = File_FolderGet_Special(enPERSONAL)
