Attribute VB_Name = "mDef"
Option Explicit

Declare Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" (pDest As Any, _
        pSource As Any, ByVal dwLength As Long)
Declare Sub CoTaskMemFree Lib "ole32.dll" (ByVal pv As Long)
Global pfoldp As String
Public Const MAX_PATH = 260
Public Const NOERROR = 0
Public Const S_OK = &H0

'--------------
Private Declare Function SHGetFolderPath Lib "shfolder" _
   Alias "SHGetFolderPathA" _
  (ByVal hwndOwner As Long, _
   ByVal nFolder As Long, _
   ByVal hToken As Long, _
   ByVal dwReserved As Long, _
   ByVal lpszPath As String) As Long
Private Const SHGFP_TYPE_CURRENT As Long = &H0
'Const MAX_PATH = 255
'--------------
'SHGetSpecialFolderLocation獲得某一個特殊的目錄的位置,如果函數調用成功返回NOERROR
'或者一個OLE錯誤
Declare Function SHGetSpecialFolderLocation Lib "shell32.dll" _
                              (ByVal hwndOwner As Long, _
                              ByVal nFolder As SHSpecialFolderIDs, _
                              pidl As Long) As Long

Public Enum SHSpecialFolderIDs      '列出所有Windows下特殊文件夾的ID
    CSIDL_DESKTOP = &H0
    CSIDL_INTERNET = &H1
    CSIDL_PROGRAMS = &H2
    CSIDL_CONTROLS = &H3
    CSIDL_PRINTERS = &H4
    CSIDL_PERSONAL = &H5
    CSIDL_FAVORITES = &H6
    CSIDL_STARTUP = &H7
    CSIDL_RECENT = &H8
    CSIDL_SENDTO = &H9
    CSIDL_BITBUCKET = &HA
    CSIDL_STARTMENU = &HB
    CSIDL_DESKTOPDIRECTORY = &H10
    CSIDL_DRIVES = &H11
    CSIDL_NETWORK = &H12
    CSIDL_NETHOOD = &H13
    CSIDL_FONTS = &H14
    CSIDL_TEMPLATES = &H15
    CSIDL_COMMON_STARTMENU = &H16
    CSIDL_COMMON_PROGRAMS = &H17
    CSIDL_COMMON_STARTUP = &H18
    CSIDL_COMMON_DESKTOPDIRECTORY = &H19
    CSIDL_APPDATA = &H1A
    CSIDL_PRINTHOOD = &H1B
    CSIDL_ALTSTARTUP = &H1D
    CSIDL_COMMON_ALTSTARTUP = &H1E
    CSIDL_COMMON_FAVORITES = &H1F
    CSIDL_INTERNET_CACHE = &H20
    CSIDL_COOKIES = &H21
    CSIDL_HISTORY = &H22
End Enum

'SHGetPathFromIDList函數將一個Item轉換為文件路徑
Declare Function SHGetPathFromIDList Lib "shell32.dll" Alias "SHGetPathFromIDListA" _
                              (ByVal pidl As Long, _
                              ByVal pszPath As String) As Long

'SHGetFileInfoPidl函數獲得某個文件對象的信息。
Declare Function SHGetFileInfoPidl Lib "shell32" Alias "SHGetFileInfoA" _
                              (ByVal pidl As Long, _
                              ByVal dwFileAttributes As Long, _
                              psfib As SHFILEINFOBYTE, _
                              ByVal cbFileInfo As Long, _
                              ByVal uFlags As SHGFI_flags) As Long

Public Type SHFILEINFOBYTE
    hIcon As Long
    iIcon As Long
    dwAttributes As Long
    szDisplayName(1 To MAX_PATH) As Byte
    szTypeName(1 To 80) As Byte
End Type

Declare Function SHGetFileInfo Lib "shell32" Alias "SHGetFileInfoA" _
                              (ByVal pszPath As String, _
                              ByVal dwFileAttributes As Long, _
                              psfi As SHFILEINFO, _
                              ByVal cbFileInfo As Long, _
                              ByVal uFlags As SHGFI_flags) As Long

Public Type SHFILEINFO
    hIcon As Long
    iIcon As Long
    dwAttributes As Long
    szDisplayName As String * MAX_PATH
    szTypeName As String * 80
End Type

Enum SHGFI_flags
    SHGFI_LARGEICON = &H0
    SHGFI_SMALLICON = &H1
    SHGFI_OPENICON = &H2
    SHGFI_SHELLICONSIZE = &H4
    SHGFI_PIDL = &H8
    SHGFI_USEFILEATTRIBUTES = &H10
    SHGFI_ICON = &H100
    SHGFI_DISPLAYNAME = &H200
    SHGFI_TYPENAME = &H400
    SHGFI_ATTRIBUTES = &H800
    SHGFI_ICONLOCATION = &H1000
    SHGFI_EXETYPE = &H2000
    SHGFI_SYSICONINDEX = &H4000
    SHGFI_LINKOVERLAY = &H8000
    SHGFI_SELECTED = &H10000
End Enum

'根據一個特定文件夾對象的ID獲得它的目錄pidl
Public Function GetPIDLFromFolderID(hOwner As Long, nFolder As SHSpecialFolderIDs) As Long
    Dim pidl As Long
    pfoldp = GetFolderPath(nFolder)
    If SHGetSpecialFolderLocation(hOwner, nFolder, pidl) = NOERROR Then
        GetPIDLFromFolderID = pidl
    End If
End Function

Public Function GetDisplayNameFromPIDL(pidl As Long) As String
    Dim sfib As SHFILEINFOBYTE
    If SHGetFileInfoPidl(pidl, 0, sfib, Len(sfib), SHGFI_PIDL Or SHGFI_DISPLAYNAME) Then
    'MsgBox StrConv(sfib.szDisplayName, vbUnicode)
    Dim pth As String
    pth = GetFolderPath(36) & "\"
        GetDisplayNameFromPIDL = GetStrFromBufferA(pth & StrConv(sfib.szDisplayName, vbUnicode))
    End If
End Function

Public Function GetPathFromPIDL(pidl As Long) As String
    Dim sPath As String * MAX_PATH
    If SHGetPathFromIDList(pidl, sPath) Then
        GetPathFromPIDL = GetStrFromBufferA(sPath)
    End If
End Function

Public Function GetStrFromBufferA(sz As String) As String
    If InStr(sz, vbNullChar) Then
        GetStrFromBufferA = Left$(sz, InStr(sz, vbNullChar) - 1)
    Else
        GetStrFromBufferA = sz
    End If
End Function
Private Function GetFolderPath(ByVal CSIDL As Long) As String
   Dim sPath As String
   Dim sTmp As String
   sPath = Space$(MAX_PATH)
   If SHGetFolderPath(Form1.hWnd, CSIDL, 0&, SHGFP_TYPE_CURRENT, sPath) = S_OK Then
   GetFolderPath = Left$(sPath, InStr(sPath, Chr$(0)) - 1)
   End If
End Function