One the criticisms and praises I often hear about Visual Basic (my language of choice) is that it makes things very easy to do. You'd be surprised, though: not all VB developers go the "easy" route to do simple tasks, such as copying files. I think most of us would use the FileCopy method. Or the FileSystemObject.CopyFile method. Or even come close the WTF-line by issuing a "copy" command with the Shell method. But for those really dedicated (such as a certain Angry DBA's colleague), they'll find yet another way of accomplishing what they need to do ...

Function CopyFile(ByVal Source As String, ByVal Destination As String) As Long
    Dim I As Long, ptr As Long
    Dim shfo As SHFILEOPSTRUCT
    Dim ByteArray() As Byte
    Dim buff1() As Byte, buff2() As Byte, buff3() As Byte
    'Private variables
    Dim cSourcefiles As Collection
    Dim cDestFiles As Collection
    m_bAllowUndo = DEFAULT_ALLOWUNDO
    m_bConfirmMakeDir = DEFAULT_CONFIRMMAKEDIR
    m_bConfirmOperation = DEFAULT_CONFIRMOPERATION
    m_sCustomText = DEFAULT_CUSTOMTEXT
    m_bIncludeDirectories = DEFAULT_INCLUDEDIRECTORIES
    m_hParentWnd = DEFAULT_PARENTWND
    m_bRenameOnCollision = DEFAULT_RENAMEONCOLLISION
    m_bSilentMode = DEFAULT_SILENTMODE
    
    Set cSourcefiles = New Collection
    Set cDestFiles = New Collection
    
    cSourcefiles.Add Source
    cDestFiles.Add Destination
    
    'Parent window of dialog box--just use 0
    shfo.hwnd = m_hParentWnd
    'Operation to perform
    shfo.wFunc = FO_COPY
    'Operation flags
    shfo.fFlags = 0
    If m_bAllowUndo Then
        shfo.fFlags = shfo.fFlags Or FOF_ALLOWUNDO
    End If
    If m_bSilentMode Then
        shfo.fFlags = shfo.fFlags Or FOF_SILENT
    End If
    If m_bRenameOnCollision Then
        shfo.fFlags = shfo.fFlags Or FOF_RENAMEONCOLLISION
    End If
    If Not m_bConfirmOperation Then
        shfo.fFlags = shfo.fFlags Or FOF_NOCONFIRMATION
    End If
    If Not m_bConfirmMakeDir Then
        shfo.fFlags = shfo.fFlags Or FOF_NOCONFIRMMKDIR
    End If
    If Not m_bIncludeDirectories Then
        shfo.fFlags = shfo.fFlags Or FOF_FILESONLY
    End If
    If Len(m_sCustomText) > 0 Then
        shfo.lpszProgressTitle = m_sCustomText
        shfo.fFlags = shfo.fFlags Or FOF_SIMPLEPROGRESS
    End If
    'Build 'From' string
    If cSourcefiles.Count = 0 Then
        Err.Raise vbObjectError + 1000, , "No source files specified file operation"
    End If
    For I = 1 To cSourcefiles.Count
        shfo.pFrom = shfo.pFrom & cSourcefiles(I) & Chr$(0)
    Next I
    'Build 'To' string
    For I = 1 To cDestFiles.Count
        shfo.pTo = shfo.pTo & cDestFiles(I) & Chr$(0)
    Next I
    'Test if more than one destination files
    If cDestFiles.Count > 1 Then
        shfo.fFlags = shfo.fFlags Or FOF_MULTIDESTFILES
    End If
    'Note: Windows packs the SHFILEOPSTRUCT structure but
    '32-bit Visual Basic does not. Therefore, all members
    'following the two-byte fFlags member are offset by
    '2 bytes. To deal with this, we copy structure members
    'to a byte array with the proper alignment and pass
    'the byte array to SHFileOperation.
    ReDim ByteArray(LenB(shfo) - 2)
    CopyMemory ByteArray(0), shfo.hwnd, Len(shfo.hwnd)
    CopyMemory ByteArray(4), shfo.wFunc, Len(shfo.wFunc)
    'Variable-length strings require extra work
    buff1 = StrConv(shfo.pFrom & Chr$(0), vbFromUnicode)
    ptr = VarPtr(buff1(0))
    CopyMemory ByteArray(8), ptr, LenB(ptr)
    buff2 = StrConv(shfo.pTo & Chr$(0), vbFromUnicode)
    ptr = VarPtr(buff2(0))
    CopyMemory ByteArray(12), ptr, LenB(ptr)
    CopyMemory ByteArray(16), shfo.fFlags, Len(shfo.fFlags)
    CopyMemory ByteArray(18), shfo.fAnyOperationsAborted, Len(shfo.fAnyOperationsAborted)
    CopyMemory ByteArray(22), shfo.hNameMappings, Len(shfo.hNameMappings)
    buff3 = StrConv(shfo.lpszProgressTitle & Chr$(0), vbFromUnicode)
    ptr = VarPtr(buff3(0))
    CopyMemory ByteArray(26), ptr, LenB(ptr)
    'Call SHFileOperation
    I = SHFileOperation(ByteArray(0))
    'Retrieve fAnyOperationsAborted flag
    CopyMemory shfo.fAnyOperationsAborted, ByteArray(18), Len(shfo.fAnyOperationsAborted)
    'Return True if SHFileOperation succeeded and no operations aborted
    CopyFile = Not CBool(I Or shfo.fAnyOperationsAborted)
    Set cSourcefiles = Nothing
    Set cDestFiles = Nothing
End Function