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  1. #1
    Join Date
    Jan 2006

    Unanswered: Open File Dialog Box

    I am designing a database for a provider of ours.

    I am using the cmd.transferspreadsheet to transfer data from many different excel files located in one folder.

    I wanted some code to get the user to browse to a folder.

    My main solutions are:

    Application.FileDialog(msoFileDialogFolderPicker) which needs a reference to Office Library


    CreateObject("Shell.Application"). BrowseForFolder(0, "Please select a folder", 0, "c:\\") which doesn't require a reference.

    Several users with little or no IT expertise will be using this system at some point - Making sure every user has the correct reference is an overhead I could do without.

    I think I'd rather use Shell - What are the drawbacks?
    What system requirements are there?
    Anyone tested this with 2000, XP, 97 etc....?

  2. #2
    Join Date
    Jan 2006
    Washington, D.C
    Create a module called main (really you can call it whatever you want) so you can call this function throughout your database.
    '***************** Code Start **************
    'This code was originally written by Ken Getz.
    'It is not to be altered or distributed,
    'except as part of an application.
    'You are free to use it in any application,
    'provided the copyright notice is left unchanged.
    ' Code courtesy of:
    ' Microsoft Access 95 How-To
    ' Ken Getz and Paul Litwin
    ' Waite Group Press, 1996
    lStructSize As Long
    hwndOwner As Long
    hInstance As Long
    strFilter As String
    strCustomFilter As String
    nMaxCustFilter As Long
    nFilterIndex As Long
    strFile As String
    nMaxFile As Long
    strFileTitle As String
    nMaxFileTitle As Long
    strInitialDir As String
    strTitle As String
    Flags As Long
    nFileOffset As Integer
    nFileExtension As Integer
    strDefExt As String
    lCustData As Long
    lpfnHook As Long
    lpTemplateName As String
    End Type

    'Not a part of the open file code. This is for the user name
    Declare Function GetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long
    Public UserID As String 'holds the username of the current user
    Public PreviousForm As String
    'Not a part of the open file code. This is for the user name

    Declare Function aht_apiGetOpenFileName Lib "comdlg32.dll" _
    Alias "GetOpenFileNameA" (OFN As tagOPENFILENAME) As Boolean

    Declare Function aht_apiGetSaveFileName Lib "comdlg32.dll" _
    Alias "GetSaveFileNameA" (OFN As tagOPENFILENAME) As Boolean
    Declare Function CommDlgExtendedError Lib "comdlg32.dll" () As Long

    Global Const ahtOFN_READONLY = &H1
    Global Const ahtOFN_OVERWRITEPROMPT = &H2
    Global Const ahtOFN_HIDEREADONLY = &H4
    Global Const ahtOFN_NOCHANGEDIR = &H8
    Global Const ahtOFN_SHOWHELP = &H10
    ' You won't use these.
    'Global Const ahtOFN_ENABLEHOOK = &H20
    'Global Const ahtOFN_ENABLETEMPLATE = &H40
    'Global Const ahtOFN_ENABLETEMPLATEHANDLE = &H80
    Global Const ahtOFN_NOVALIDATE = &H100
    Global Const ahtOFN_ALLOWMULTISELECT = &H200
    Global Const ahtOFN_EXTENSIONDIFFERENT = &H400
    Global Const ahtOFN_PATHMUSTEXIST = &H800
    Global Const ahtOFN_FILEMUSTEXIST = &H1000
    Global Const ahtOFN_CREATEPROMPT = &H2000
    Global Const ahtOFN_SHAREAWARE = &H4000
    Global Const ahtOFN_NOREADONLYRETURN = &H8000
    Global Const ahtOFN_NOTESTFILECREATE = &H10000
    Global Const ahtOFN_NONETWORKBUTTON = &H20000
    Global Const ahtOFN_NOLONGNAMES = &H40000
    ' New for Windows 95
    Global Const ahtOFN_EXPLORER = &H80000
    Global Const ahtOFN_NODEREFERENCELINKS = &H100000
    Global Const ahtOFN_LONGNAMES = &H200000

    Public Enum StripType
    se_Char = &H1
    se_Num = &H2
    se_NonWord = &H4
    se_Space = &H8
    se_AllButChar = &H10
    se_AllButNum = &H20
    se_Custom = &H40
    End Enum
    Function GetOpenFile(Optional varDirectory As Variant, _
    Optional varTitleForDialog As Variant) As Variant
    ' Here's an example that gets an Access database name.
    Dim strFilter As String
    Dim lngFlags As Long
    Dim varFileName As Variant
    ' Specify that the chosen file must already exist,
    ' don't change directories when you're done
    ' Also, don't bother displaying
    ' the read-only box. It'll only confuse people.
    lngFlags = ahtOFN_FILEMUSTEXIST Or _
    If IsMissing(varDirectory) Then
    varDirectory = ""
    End If
    If IsMissing(varTitleForDialog) Then
    varTitleForDialog = ""
    End If

    ' Define the filter string and allocate space in the "c"
    ' string Duplicate this line with changes as necessary for
    ' more file templates.
    strFilter = ahtAddFilterItem(strFilter, _
    "Access (*.mdb)", "*.MDB;*.MDA")
    ' Now actually call to get the file name.
    varFileName = ahtCommonFileOpenSave( _
    OpenFile:=True, _
    InitialDir:=varDirectory, _
    Filter:=strFilter, _
    Flags:=lngFlags, _
    If Not IsNull(varFileName) Then
    varFileName = TrimNull(varFileName)
    End If
    GetOpenFile = varFileName
    End Function

    Function ahtCommonFileOpenSave( _
    Optional ByRef Flags As Variant, _
    Optional ByVal InitialDir As Variant, _
    Optional ByVal Filter As Variant, _
    Optional ByVal FilterIndex As Variant, _
    Optional ByVal DefaultExt As Variant, _
    Optional ByVal filename As Variant, _
    Optional ByVal DialogTitle As Variant, _
    Optional ByVal hwnd As Variant, _
    Optional ByVal OpenFile As Variant) As Variant
    ' This is the entry point you'll use to call the common
    ' file open/save dialog. The parameters are listed
    ' below, and all are optional.
    ' In:
    ' Flags: one or more of the ahtOFN_* constants, OR'd together.
    ' InitialDir: the directory in which to first look
    ' Filter: a set of file filters, set up by calling
    ' AddFilterItem. See examples.
    ' FilterIndex: 1-based integer indicating which filter
    ' set to use, by default (1 if unspecified)
    ' DefaultExt: Extension to use if the user doesn't enter one.
    ' Only useful on file saves.
    ' FileName: Default value for the file name text box.
    ' DialogTitle: Title for the dialog.
    ' hWnd: parent window handle
    ' OpenFile: Boolean(True=Open File/False=Save As)
    ' Out:
    ' Return Value: Either Null or the selected filename
    Dim strFileName As String
    Dim strFileTitle As String
    Dim fResult As Boolean
    ' Give the dialog a caption title.
    If IsMissing(InitialDir) Then InitialDir = CurDir
    If IsMissing(Filter) Then Filter = ""
    If IsMissing(FilterIndex) Then FilterIndex = 1
    If IsMissing(Flags) Then Flags = 0&
    If IsMissing(DefaultExt) Then DefaultExt = ""
    If IsMissing(filename) Then filename = ""
    If IsMissing(DialogTitle) Then DialogTitle = ""
    If IsMissing(hwnd) Then hwnd = Application.hWndAccessApp
    If IsMissing(OpenFile) Then OpenFile = True
    ' Allocate string space for the returned strings.
    strFileName = Left(filename & String(256, 0), 256)
    strFileTitle = String(256, 0)
    ' Set up the data structure before you call the function
    With OFN
    .lStructSize = Len(OFN)
    .hwndOwner = hwnd
    .strFilter = Filter
    .nFilterIndex = FilterIndex
    .strFile = strFileName
    .nMaxFile = Len(strFileName)
    .strFileTitle = strFileTitle
    .nMaxFileTitle = Len(strFileTitle)
    .strTitle = DialogTitle
    .Flags = Flags
    .strDefExt = DefaultExt
    .strInitialDir = InitialDir
    ' Didn't think most people would want to deal with
    ' these options.
    .hInstance = 0
    '.strCustomFilter = ""
    '.nMaxCustFilter = 0
    .lpfnHook = 0
    'New for NT 4.0
    .strCustomFilter = String(255, 0)
    .nMaxCustFilter = 255
    End With
    ' This will pass the desired data structure to the
    ' Windows API, which will in turn it uses to display
    ' the Open/Save As Dialog.
    If OpenFile Then
    fResult = aht_apiGetOpenFileName(OFN)
    fResult = aht_apiGetSaveFileName(OFN)
    End If

    ' The function call filled in the strFileTitle member
    ' of the structure. You'll have to write special code
    ' to retrieve that if you're interested.
    If fResult Then
    ' You might care to check the Flags member of the
    ' structure to get information about the chosen file.
    ' In this example, if you bothered to pass in a
    ' value for Flags, we'll fill it in with the outgoing
    ' Flags value.
    If Not IsMissing(Flags) Then Flags = OFN.Flags
    ahtCommonFileOpenSave = TrimNull(OFN.strFile)
    ahtCommonFileOpenSave = vbNullString
    End If
    End Function

    Function ahtAddFilterItem(strFilter As String, _
    strDescription As String, Optional varItem As Variant) As String
    ' Tack a new chunk onto the file filter.
    ' That is, take the old value, stick onto it the description,
    ' (like "Databases"), a null character, the skeleton
    ' (like "*.mdb;*.mda") and a final null character.

    If IsMissing(varItem) Then varItem = "*.*"
    ahtAddFilterItem = strFilter & _
    strDescription & vbNullChar & _
    varItem & vbNullChar
    End Function
    Private Function TrimNull(ByVal strItem As String) As String
    Dim intPos As Integer
    intPos = InStr(strItem, vbNullChar)
    If intPos > 0 Then
    TrimNull = Left(strItem, intPos - 1)
    TrimNull = strItem
    End If
    End Function
    '************** Code End *****************

    To call the function just do the following:

    strFilter = ahtAddFilterItem(strFilter, "Excel Files (*.xls)", "*.xls")
    strFilter = ahtAddFilterItem(strFilter, "All Files (*.*)", "*.*")

    filePath = ahtCommonFileOpenSave( _
    OpenFile:=True, _
    Filter:=strFilter, _
    filename:=filename, _

    strFilter creates filters so you will only show certain files.
    If you change OpenFile = False it will change to a save dialog.

  3. #3
    Join Date
    Sep 2005
    For the codes, how can we set to "My Computer" location when calling the functions?


  4. #4
    Join Date
    Nov 2003
    Quote Originally Posted by accessman2
    For the codes, how can we set to "My Computer" location when calling the functions?
    You can get hold of this location (path) by using yet another Windows API function. The SHGetSpecialFolderPath function which pools out of the Shell32.dll library. Here is sample of how you might obtain the path to My Documents:

    ' Get the path for the "Common Repository For
    ' Documents" (the My Documents folder).
    Dim Path As String
    Path = Space$(260)
    If SHGetSpecialFolderPath(Me.hwnd, Path, &H5, False) Then
       Path = Left$(Path, InStr(Path, Chr$(0)))
       Path = "Unknown"
    End If
    MsgBox Path
    The Hex &H5 tell the function which folder path to pull up. Here is a list of many other folders and their hex Pull-up values that you may want:

    Value Description

    &H30 "Stores administrative tools for an individual user"
    &H1D "The user's nonlocalized Startup program group"
    &H1A "Common repository for application-specific data"
    &HA "Recycle Bin"
    &H2F "Administrative tools for all users"
    &H1E "Nonlocalized Startup program group for all users (NT)"
    &H23 "Application data for all users"
    &H19 "Folder containing files and folders on the desktop (NT)"
    &H2E "Documents common to all users (95, 98, NT)"
    &H1F "Common repository for all users' favorite items (NT)"
    &H17 "Program groups that appear on the Start menu for all users (NT)"
    &H16 "Programs and folders that appear on the Start menu for all users (NT)"
    &H18 "Programs that appear in the Startup folder for all users (NT)
    &H2D "Templates available for all users (NT)"
    &H3 "Icons for the Control Panel applets"
    &H21 "Repository for Internet cookies"
    &H0 "Desktop root namespace"
    &H10 "Directory that holds physical desktop items"
    &H11 "My Computer"
    &H6 "Repository for the user's favorite items"
    &H14 "Fonts"
    &H22 "Internet history items"
    &H1 "Virtual folder representing the Internet"
    &H20 "Temporary Internet files"
    &H1C "Data repository for local (non-roaming) applications"
    &HD "Music files"
    &H27 "Picture files"
    &H13 "My Network Places"
    &H12 "Network Neighborhood"
    &H5 "Common repository for documents - My Documents"
    &H4 "Installed printers"
    &H1B "Printers virtual folder"
    &H28 "The user's profile folder"
    &H26 "Program Files"
    &H2B "Components shared across applications (NT, 2000)"
    &H2 "The user's program groups"
    &H8 "Recently used documents"
    &H9 "SendTo menu items"
    &HB "Start menu items"
    &H7 "The user's Startup group"
    &H25 "System folder"
    &H15 "Common repository for document templates"
    &H24 "Windows directory (SYSROOT)"


    Self Taught In ALL Environments.....And It Shows!

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