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Code for using the Animated Copy Functions in Windows 95/98

Code for using the Animated Copy Functions in Windows 95/98

API Declarations


'in the pFrom member to the
'location specified in the
'pTo member.

Private Const FO_DELETE = &H3& 'Deletes the files specified
'in pFrom (pTo is ignored.)

Private Const FO_MOVE = &H1& 'Moves the files specified
'in pFrom to the location
'specified in pTo.

Private Const FO_RENAME = &H4& 'Renames the files
'specified in pFrom.

Private Const FOF_ALLOWUNDO = &H40& 'Preserve Undo information.

Private Const FOF_CONFIRMMOUSE = &H2& 'Not currently implemented.

Private Const FOF_CREATEPROGRESSDLG = &H0& 'handle to the parent
'window for the
'progress dialog box.

Private Const FOF_FILESONLY = &H80& 'Perform the operation
'on files only if a
'wildcard file name
'(*.*) is specified.

Private Const FOF_MULTIDESTFILES = &H1& 'The pTo member
'specifies multiple
'destination files (one
'for each source file)
'rather than one
'directory where all
'source files are
'to be deposited.

Private Const FOF_NOCONFIRMATION = &H10& 'Respond with Yes to
'All for any dialog box
'that is displayed.

Private Const FOF_NOCONFIRMMKDIR = &H200& 'Does not confirm the
'creation of a new
'directory if the
'operation requires one
'to be created.

Private Const FOF_RENAMEONCOLLISION = &H8& 'Give the file being
'operated on a new name
'in a move, copy, or
'rename operation if a
'file with the target
'name already exists.

Private Const FOF_SILENT = &H4& 'Does not display a
'progress dialog box.

Private Const FOF_SIMPLEPROGRESS = &H100& 'Displays a progress
'dialog box but does
'not show the
'file names.

Private Const FOF_WANTMAPPINGHANDLE = &H20&
'If FOF_RENAMEONCOLLISION is specified,
'the hNameMappings member will be filled
'in if any files were renamed.

' The SHFILOPSTRUCT is not double-word aligned. If no steps are
' taken, the last 3 variables will not be passed correctly. This
' has no impact unless the progress title needs to be changed.

Private Type SHFILEOPSTRUCT
hwnd As Long
wFunc As Long
pFrom As String
pTo As String
fFlags As Integer
fAnyOperationsAborted As Long
hNameMappings As Long
lpszProgressTitle As String
End Type

Private Declare Sub CopyMemory Lib "KERNEL32" _
Alias "RtlMoveMemory" _
(hpvDest As Any, _
hpvSource As Any, _
ByVal cbCopy As Long)

Private Declare Function SHFileOperation Lib "Shell32.dll" _
Alias "SHFileOperationA" _
(lpFileOp As Any) As Long



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Private Sub Form_Load()
   Check1.Caption = "Copy All Files in VB Directory"
   Check2.Caption = "Display Custom Message"
   Command1.Caption = "Copy Files"
End Sub

Private Sub Command1_Click()
   Dim result As Long
   Dim lenFileop As Long
   Dim foBuf() As Byte
   Dim fileop As SHFILEOPSTRUCT

   lenFileop = LenB(fileop)    ' double word alignment increase
   ReDim foBuf(1 To lenFileop) ' the size of the structure.

   With fileop
      .hwnd = Me.hwnd

      .wFunc = FO_COPY

      ' The files to copy separated by Nulls and terminated by two
      ' nulls
      If Check1.Value = vbChecked Then
         .pFrom = "C:\Program Files\DevStudio\VB\*.*" _
              & vbNullChar & vbNullChar
         .fFlags = FOF_SIMPLEPROGRESS Or FOF_FILESONLY
      Else
         .pFrom = "C:\PROGRAM FILES\DEVSTUDIO\VB\VB5.EXE" _
                  & vbNullChar _
                  & "C:\PROGRAM FILES\DEVSTUDIO\VB\README.HLP" _
                  & vbNullChar _
                  & vbNullChar
      End If

      .pTo = "C:\testfolder\" & vbNullChar & vbNullChar

      If Check2.Value = vbChecked Then
         .fFlags = FOF_SIMPLEPROGRESS Or FOF_NOCONFIRMATION Or _
                   FOF_NOCONFIRMMKDIR
         .lpszProgressTitle = "Your custom dialog string " & _
                              "appears here." & vbNullChar _
                                              & vbNullChar
      End If
   End With

   ' Now we need to copy the structure into a byte array
   Call CopyMemory(foBuf(1), fileop, lenFileop)

   ' Next we move the last 12 bytes by 2 to byte align the data
   Call CopyMemory(foBuf(19), foBuf(21), 12)
   result = SHFileOperation(foBuf(1))

   If result <> 0 Then  ' Operation failed
      MsgBox Err.LastDllError 'Show the error returned from
                              'the API.
      Else
      If fileop.fAnyOperationsAborted <> 0 Then
         MsgBox "Operation Failed"
      End If
   End If
End Sub