MS Access: how to compact current database in VBA - vba

Pretty simple question, I know.

If you want to compact/repair an external mdb file (not the one you are working in just now):
Application.compactRepair sourecFile, destinationFile
If you want to compact the database you are working with:
Application.SetOption "Auto compact", True
In this last case, your app will be compacted when closing the file.
My opinion: writting a few lines of code in an extra MDB "compacter" file that you can call when you want to compact/repair an mdb file is very usefull: in most situations the file that needs to be compacted cannot be opened normally anymore, so you need to call the method from outside the file.
Otherwise, the autocompact shall by default be set to true in each main module of an Access app.
In case of a disaster, create a new mdb file and import all objects from the buggy file. You will usually find a faulty object (form, module, etc) that you will not be able to import.

If you have the database with a front end and a back end. You can use the following code on the main form of your front end main navigation form:
Dim sDataFile As String, sDataFileTemp As String, sDataFileBackup As String
Dim s1 As Long, s2 As Long
sDataFile = "C:\MyDataFile.mdb"
sDataFileTemp = "C:\MyDataFileTemp.mdb"
sDataFileBackup = "C:\MyDataFile Backup " & Format(Now, "YYYY-MM-DD HHMMSS") & ".mdb"
DoCmd.Hourglass True
'get file size before compact
Open sDataFile For Binary As #1
s1 = LOF(1)
Close #1
'backup data file
FileCopy sDataFile, sDataFileBackup
'only proceed if data file exists
If Dir(sDataFileBackup, vbNormal) <> "" Then
'compact data file to temp file
On Error Resume Next
Kill sDataFileTemp
On Error GoTo 0
DBEngine.CompactDatabase sDataFile, sDataFileTemp
If Dir(sDataFileTemp, vbNormal) <> "" Then
'delete old data file data file
Kill sDataFile
'copy temp file to data file
FileCopy sDataFileTemp, sDataFile
'get file size after compact
Open sDataFile For Binary As #1
s2 = LOF(1)
Close #1
DoCmd.Hourglass False
MsgBox "Compact complete. " & vbCrLf & vbCrLf _
& "Size before: " & Round(s1 / 1024 / 1024, 2) & "MB" & vbCrLf _
& "Size after: " & Round(s2 / 1024 / 1024, 2) & "MB", vbInformation
Else
DoCmd.Hourglass False
MsgBox "ERROR: Unable to compact data file."
End If
Else
DoCmd.Hourglass False
MsgBox "ERROR: Unable to backup data file."
End If
DoCmd.Hourglass False

Try adding this module, pretty simple, just launches Access, opens the database, sets the "Compact on Close" option to "True", then quits.
Syntax to auto-compact:
acCompactRepair "C:\Folder\Database.accdb", True
To return to default*:
acCompactRepair "C:\Folder\Database.accdb", False
*not necessary, but if your back end database is >1GB this can be rather annoying when you go into it directly and it takes 2 minutes to quit!
EDIT: added option to recurse through all folders, I run this nightly to keep databases down to a minimum.
'accCompactRepair
'v2.02 2013-11-28 17:25
'===========================================================================
' HELP CONTACT
'===========================================================================
' Code is provided without warranty and can be stolen and amended as required.
' Tom Parish
' TJP#tomparish.me.uk
' http://baldywrittencod.blogspot.com/2013/10/vba-modules-access-compact-repair.html
' DGF Help Contact: see BPMHelpContact module
'=========================================================================
'includes code from
'http://www.ammara.com/access_image_faq/recursive_folder_search.html
'tweaked slightly for improved error handling
' v2.02 bugfix preventing Compact when bAutoCompact set to False
' bugfix with "OLE waiting for another application" msgbox
' added "MB" to start & end sizes of message box at end
' v2.01 added size reduction to message box
' v2.00 added recurse
' v1.00 original version
Option Explicit
Function accSweepForDatabases(ByVal strFolder As String, Optional ByVal bIncludeSubfolders As Boolean = True _
, Optional bAutoCompact As Boolean = False) As String
'v2.02 2013-11-28 17:25
'sweeps path for .accdb and .mdb files, compacts and repairs all that it finds
'NB: leaves AutoCompact on Close as False unless specified, then leaves as True
'syntax:
' accSweepForDatabases "path", [False], [True]
'code for ActiveX CommandButton on sheet module named "admin" with two named ranges "vPath" and "vRecurse":
' accSweepForDatabases admin.Range("vPath"), admin.Range("vRecurse") [, admin.Range("vLeaveAutoCompact")]
Application.DisplayAlerts = False
Dim colFiles As New Collection, vFile As Variant, i As Integer, j As Integer, sFails As String, t As Single
Dim SizeBefore As Long, SizeAfter As Long
t = Timer
RecursiveDir colFiles, strFolder, "*.accdb", True 'comment this out if you only have Access 2003 installed
RecursiveDir colFiles, strFolder, "*.mdb", True
For Each vFile In colFiles
'Debug.Print vFile
SizeBefore = SizeBefore + (FileLen(vFile) / 1048576)
On Error GoTo CompactFailed
If InStr(vFile, "Geographical Configuration.accdb") > 0 Then MsgBox "yes"
acCompactRepair vFile, bAutoCompact
i = i + 1 'counts successes
GoTo NextCompact
CompactFailed:
On Error GoTo 0
j = j + 1 'counts failures
sFails = sFails & vFile & vbLf 'records failure
NextCompact:
On Error GoTo 0
SizeAfter = SizeAfter + (FileLen(vFile) / 1048576)
Next vFile
Application.DisplayAlerts = True
'display message box, mark end of process
accSweepForDatabases = i & " databases compacted successfully, taking " & CInt(Timer - t) & " seconds, and reducing storage overheads by " & Int(SizeBefore - SizeAfter) & "MB" & vbLf & vbLf & "Size Before: " & Int(SizeBefore) & "MB" & vbLf & "Size After: " & Int(SizeAfter) & "MB"
If j > 0 Then accSweepForDatabases = accSweepForDatabases & vbLf & j & " failures:" & vbLf & vbLf & sFails
MsgBox accSweepForDatabases, vbInformation, "accSweepForDatabases"
End Function
Function acCompactRepair(ByVal pthfn As String, Optional doEnable As Boolean = True) As Boolean
'v2.02 2013-11-28 16:22
'if doEnable = True will compact and repair pthfn
'if doEnable = False will then disable auto compact on pthfn
On Error GoTo CompactFailed
Dim A As Object
Set A = CreateObject("Access.Application")
With A
.OpenCurrentDatabase pthfn
.SetOption "Auto compact", True
.CloseCurrentDatabase
If doEnable = False Then
.OpenCurrentDatabase pthfn
.SetOption "Auto compact", doEnable
End If
.Quit
End With
Set A = Nothing
acCompactRepair = True
Exit Function
CompactFailed:
End Function
'source: http://www.ammara.com/access_image_faq/recursive_folder_search.html
'tweaked slightly for error handling
Private Function RecursiveDir(colFiles As Collection, _
strFolder As String, _
strFileSpec As String, _
bIncludeSubfolders As Boolean)
Dim strTemp As String
Dim colFolders As New Collection
Dim vFolderName As Variant
'Add files in strFolder matching strFileSpec to colFiles
strFolder = TrailingSlash(strFolder)
On Error Resume Next
strTemp = ""
strTemp = Dir(strFolder & strFileSpec)
On Error GoTo 0
Do While strTemp <> vbNullString
colFiles.Add strFolder & strTemp
strTemp = Dir
Loop
If bIncludeSubfolders Then
'Fill colFolders with list of subdirectories of strFolder
On Error Resume Next
strTemp = ""
strTemp = Dir(strFolder, vbDirectory)
On Error GoTo 0
Do While strTemp <> vbNullString
If (strTemp <> ".") And (strTemp <> "..") Then
If (GetAttr(strFolder & strTemp) And vbDirectory) <> 0 Then
colFolders.Add strTemp
End If
End If
strTemp = Dir
Loop
'Call RecursiveDir for each subfolder in colFolders
For Each vFolderName In colFolders
Call RecursiveDir(colFiles, strFolder & vFolderName, strFileSpec, True)
Next vFolderName
End If
End Function
Private Function TrailingSlash(strFolder As String) As String
If Len(strFolder) > 0 Then
If Right(strFolder, 1) = "\" Then
TrailingSlash = strFolder
Else
TrailingSlash = strFolder & "\"
End If
End If
End Function

For Access 2013, you could just do
Sendkeys "%fic"
This is the same as typing ALT, F, I, C on your keyboard.
It's probably a different sequence of letters for different versions, but the "%" symbol means "ALT", so keep that in the code. you may just need to change the letters, depending on what letters appear when you press ALT
Letters that appear when pressing ALT in Access 2013

In response to the excellent post by jdawgx:
Please be aware of a flaw in the code for CompactDB() above.
If the database's "AppTitle" property is defined (as happens when an "Application title" is defined in the database properties), this invalidates the "default window title" logic shown, which can cause the script to fail, or "behave unpredictably". So, adding code to check for an AppTitle property - or using API calls to read the Window title text from the Application.hWndAccessApp window could both be much more reliable.
Additionally, in Access 2019, we have observed that:
SendKeys "multi-key-string-here"
... may also not work reliably, needing to be replaced with:
SendKey (single-character)
'put a DoEvents or Sleep 150 here
SendKey (single-character)
'put a DoEvents or Sleep 150 here
SendKey (single-character)
'put a DoEvents or Sleep 150 here
SendKey (single-character)
...to get proper responses from the Access UI.
ALSO for Access 2019:
Sendkeys "%yc" ( <-- works for Access 2016)
is no longer correct.
it is now:
Sendkeys "%y1c"
...and if that little change wasn't enough - try to determine (in code) how to tell the difference between Access 2016 and 2019 - Good Luck!! because
Application.Version alone won't help, and even combining Application.Version and Application.Build is not a guarantee (unless you are in a controlled-release enterprise environment, and then it may work as the possible version/build #s in circulation should be more limited).

Yes it is simple to do.
Sub CompactRepair()
Dim control As Office.CommandBarControl
Set control = CommandBars.FindControl( Id:=2071 )
control.accDoDefaultAction
End Sub
Basically it just finds the "Compact and repair" menuitem and clicks it, programatically.

I did this many years back on 2003 or possibly 97, yikes!
If I recall you need to use one of the subcommands above tied to a timer. You cannot operate on the db with any connections or forms open.
So you do something about closing all forms, and kick off the timer as the last running method. (which will in turn call the compact operation once everything closes)
If you haven't figured this out I could dig through my archives and pull it up.

When the user exits the FE attempt to rename the backend MDB preferably with todays date in the name in yyyy-mm-dd format. Ensure you close all bound forms, including hidden forms, and reports before doing this. If you get an error message, oops, its busy so don't bother. If it is successful then compact it back.
See my Backup, do you trust the users or sysadmins? tips page for more info.

DBEngine.CompactDatabase source, dest

Application.SetOption "Auto compact", False '(mentioned above)
Use this with a button caption: "DB Not Compact On Close"
Write code to toggle the caption with "DB Compact On Close"
along with Application.SetOption "Auto compact", True
AutoCompact can be set by means of the button or by code, ex: after importing large temp tables.
The start up form can have code that turns off Auto Compact, so that it doesn't run every time.
This way, you are not trying to fight Access.

If you don't wish to use compact on close (eg, because the front-end mdb is a robot program that runs continually), and you don't want to create a separate mdb just for compacting, consider using a cmd file.
I let my robot.mdb check its own size:
FileLen(CurrentDb.Name))
If its size exceeds 1 GB, it creates a cmd file like this ...
Dim f As Integer
Dim Folder As String
Dim Access As String
'select Access in the correct PF directory (my robot.mdb runs in 32-bit MSAccess, on 32-bit and 64-bit machines)
If Dir("C:\Program Files (x86)\Microsoft Office\Office\MSACCESS.EXE") > "" Then
Access = """C:\Program Files (x86)\Microsoft Office\Office\MSACCESS.EXE"""
Else
Access = """C:\Program Files\Microsoft Office\Office\MSACCESS.EXE"""
End If
Folder = ExtractFileDir(CurrentDb.Name)
f = FreeFile
Open Folder & "comrep.cmd" For Output As f
'wait until robot.mdb closes (ldb file is gone), then compact robot.mdb
Print #f, ":checkldb1"
Print #f, "if exist " & Folder & "robot.ldb goto checkldb1"
Print #f, Access & " " & Folder & "robot.mdb /compact"
'wait until the robot mdb closes, then start it
Print #f, ":checkldb2"
Print #f, "if exist " & Folder & "robot.ldb goto checkldb2"
Print #f, Access & " " & Folder & "robot.mdb"
Close f
... launches the cmd file ...
Shell ExtractFileDir(CurrentDb.Name) & "comrep.cmd"
... and shuts down ...
DoCmd.Quit
Next, the cmd file compacts and restarts robot.mdb.

Try this. It works on the same database in which the code resides. Just call the CompactDB() function shown below. Make sure that after you add the function, you click the Save button in the VBA Editor window prior to running for the first time. I only tested it in Access 2010. Ba-da-bing, ba-da-boom.
Public Function CompactDB()
Dim strWindowTitle As String
On Error GoTo err_Handler
strWindowTitle = Application.Name & " - " & Left(Application.CurrentProject.Name, Len(Application.CurrentProject.Name) - 4)
strTempDir = Environ("Temp")
strScriptPath = strTempDir & "\compact.vbs"
strCmd = "wscript " & """" & strScriptPath & """"
Open strScriptPath For Output As #1
Print #1, "Set WshShell = WScript.CreateObject(""WScript.Shell"")"
Print #1, "WScript.Sleep 1000"
Print #1, "WshShell.AppActivate " & """" & strWindowTitle & """"
Print #1, "WScript.Sleep 500"
Print #1, "WshShell.SendKeys ""%yc"""
Close #1
Shell strCmd, vbHide
Exit Function
err_Handler:
MsgBox "Error " & Err.Number & ": " & Err.Description
Close #1
End Function

Please Note the following - all of you who favor doing a "Compact on Close" solution for MS-Access.
I used to prefer that option too, until one day, when I received the WORST error message possible from the DBEngine during a Compress & Repair operation:
"Table MSysObjects is corrupt - Table Truncated."
Now, you have probably never realized that THAT error is even a possibility.
Well, it is. And if you ever see it, your ENTIRE DATABASE, and EVERYTHING IN IT is now simply GONE. poof!
What is funny about that is that Access will let you actually reopen the "fixed" database, only, the Access window and menu items are all now utterly useless (except to close the DB and exit access again) because ALL the tables (including the other MSYS* tables, forms, queries, reports, code modules, & macros) are simply gone - and with the disk space previously allocated to them released to the tender mercies of the Windows OS - unless you have additional protection than the bog-standard recycle bin, which won't help you either.
So, if you REALLY want to accept the risk of Compact on Close completely clobbering your database - with NO POSSIBILITY of recovering it, then please...do carry on.
If, OTOH, like me you find that risk an unacceptable one, well, don't enable C&R-on-Close - ever again.

Check out this solution VBA Compact Current Database.
Basically it says this should work
Public Sub CompactDB()
CommandBars("Menu Bar").Controls("Tools").Controls ("Database utilities"). _
Controls("Compact and repair database...").accDoDefaultAction
End Sub

There's also Michael Kaplan's SOON ("Shut One, Open New") add-in. You'd have to chain it, but it's one way to do this.
I can't say I've had much reason to ever want to do this programatically, since I'm programming for end users, and they are never using anything but the front end in the Access user interface, and there's no reason to regularly compact a properly-designed front end.

Related

Insert an image file in a MAC Word Userform

I am not a programmer so not sure what to do here. I would like an option of adding an image file in a Microsoft Word document userform for MAC. I had used a code earlier which works perfectly in Windows but it doesnt work for MAC and gives a 5948 error. I had added a field for the image in the userform with a button to add the image and the final submit button. The add button should allow the user to insert any size image from the local folder.
The code I was using is given below:
Dim ImagePath As String
Private Sub CMDAddImage_Click()
Dim objFileDialog As Office.FileDialog
Set objFileDialog = Application.FileDialog(MsoFileDialogType.msoFileDialogFilePicker)
With objFileDialog
.AllowMultiSelect = False
.ButtonName = "File Picker"
.Title = "File Picker"
If (.Show > 0) Then
End If
If (.SelectedItems.Count > 0) Then
Call MsgBox(.SelectedItems(1))
ImagePath = .SelectedItems(1)
End If
End With
Image1.Picture = LoadPicture(ImagePath)
End Sub
And the code in submit button was:
Dim objWord
Dim objDoc
Dim objShapes
Dim objSelection
'Set objSelection = ActiveDocument.Sections
'objSelection.TypeText (vbCrLf & "One Picture will be inserted here....")
ActiveDocument.Bookmarks("Field04").Select
Set objShapes = ActiveDocument.InlineShapes
objShapes.AddPicture (ImagePath)
End
End Sub
Can someone please help me edit the code for mac. In mac it does not allow to add the file.
You should check out the suggestion made by #JohnKorchok in a comment to your previous question - insert an image Content Control in your document instead, and throw away the VBA.
But if you need to keep using VBA and a UserForm...
Application.FileDialog is not available on Mac.
Application.GetOpenFileName is not avaialble from Word (it's an Excel thing).
Application.Dialogs does not do the same thing as GetOpenFileName so the user experience will be rather different, but at its simplest, you can use it like this:
With Application.Dialogs(wdDialogFileOpen)
' .Display = -1 for "OK" ("Open" in this case)
' .Display = 0 for "Cancel"
' (THere are other possible return values
' but I do not think they are applicable here)
If .Display = -1 Then
ImagePath = .Name
End If
End With
or if you prefer, the lengthier
Dim dlg As Word.Dialog
Set dlg = Application.Dialogs(wdDialogFileOpen)
With dlg
If .Display = -1 Then
ImagePath = .Name
End If
End With
Set dlg = Nothing
However, this dilaog does not let you specify file types or any kind of filtering, a starting folder etc. Attempts to set Finder search criteria via something like
.Name = "(_kMDItemFileName = ""*.jpg"")"
.Update
before the .Display either can't work or need different syntax.
Further, the Apple dialog may start with its
own filtering set up so the user will have to click Options to enable All Files. You don't know what file type the user will choose so you will need to deal with that.
An alternative is to invoke Applescript. For this, it appears that you can still use the VBA MacScript command, which means that you can put all the script in your VBA file. If that does not work, then unfortunately you have to use AppleScriptTask which would require you to work some more on the Script and install the script in the correct folder on every Mac where you need this feature.
Here's the code I used - you would probably need to wrap everything up in another function call and use conditional compilation or other tests to call the correct routine depending on whether the code is running on Mac or Windows
Private Sub CMDAddImage_Click()
Dim s As String
Dim sFileName As String
On Error Resume Next
s = ""
' set this to some other location as appropriate
s = s & "set thePictureFoldersPath to (path to pictures folder)" & vbNewLine
s = s & "set applescript's text item delimiters to "",""" & vbNewLine
s = s & "set theFile to ¬" & vbNewLine
' add the image file types you want here
s = s & "(choose file of type {""png"",""jpg""} ¬" & vbNewLine
s = s & "with prompt ""Choose an image to insert."" ¬" & vbNewLine
s = s & "default location alias thePictureFoldersPath ¬" & vbNewLine
s = s & "multiple selections allowed false) as string" & vbNewLine
s = s & "set applescript's text item delimiters to """"" & vbNewLine
' choose file gives as an AFS path name (with colon delimiters)
' get one Word 2016/2019 will work with
s = s & "posix path of theFile"
sFileName = MacScript(s)
If sFileName <> "" Then
' Maybe do some more validation here
ImagePath = sFileName
Image1.Picture = LoadPicture(ImagePath)
End If
End Sub

VBA FileCopy inside a loop fails after one successful copy; Problem: How to Close files before next use?

..................................................................................................................................................................
Late-breaking news...
P.P.S. I just read that FileSystem.FileCopy is better than just FileCopy. That's what I'm going to try. But I really would like to know how to use FileCopy inside a loop, meaning, "How do I close files used in FileCopy?" For the big picture made clear, read on.
..................................................................................................................................................................
(Using Windows 10 Pro, Word 365 Pro)
The online Help for FileCopy Src, Dest says that it ... Copies a file from Src to Dest [but] does not work on a currently open file. Both ... files must be closed [by] the Close statement.
But the online help for Close, from link supplied on that page connects to help for Close for the Open statement, which says that it "Closes the file(s) previously opened with the" Open statement, not the FileCopy statement.
So it is that I'm stumped on what to do with this code, which will copy the first code module in the Document to a backup location, but not the second.
Pic#1: Info about what's supposedly going to be copied
Pic#2: Original error message without On Error
(I have no clue why all these blank lines. They're NOT in my Body.)
Please ignore all the OnError stuff for now.
When the second code module should have been copied, execution halted with error "File not found".
Sub BackupModules()
Dim prj As VBProject
Dim comp As VBComponent
Dim code As CodeModule
Set prj = ThisDocument.VBProject
Dim k As Integer, n As Integer
Dim Destination As String, Prefix As String
Prefix = "junk"
k = 0: n = 0
On Error GoTo x
For Each comp In prj.VBComponents
On Error GoTo x
k = k + 1
If comp.Type = vbext_ct_StdModule Then
n = n + 1
Destination = Prefix & n
MsgBox "Copying Standard module " & n & " of " & k & " components encountered: <" & comp.Name & "> to " _
& Destination & "; # lines: " & comp.CodeModule.CountOfLines
On Error GoTo x
FileCopy comp.Name, Destination
MsgBox "Success"
Close
Else
x: If Err.Number <> 0 Then: _
msg = "Error # " & Str(Err.Number) & " was generated by " _
& Err.Source & Chr(13) & Err.Description: _
MsgBox msg, , "Error", Err.HelpFile, Err.HelpContext: On Error GoTo 0: Close:
End If
Next
End Sub
Then I began experimenting (a LOT as you can see) with On Error Goto x being placed at various places (one at a time and then all, as shown) and the nasty-looking but syntactically and logically correct line that starts x: If Err... placed inside the Else block.
Pic#3: Error msg after using On Error
(FWIW, I just spotted Normal in the Err.Source part of the error message above. Online help says, "When an unexpected error occurs in your code, the Source property is automatically filled in. For errors in a standard module, Source contains the project name. For errors in a class module, Source contains a name with the project.class form." Indeed, the code is in a Module within the Normal Project.)
Pic#4: Line causing error that On Error did NOT trap
So what's wrong? I've tried everything I can think of. The only help I could find for Close did NOT mention its use with FileCopy. My Close usages caused no error but did Close close both the source and the destination file? Surely not. First use of FileCopy worked, files (probably) not closed, thus second use of FileCopy failed. Docs say using FileCopy on an open file will cause error.
On Error Goto x or to 0 is neither here nor there. That's why I said to ignore them at first.
The question is apparently "How do I close both files mentioned in FileCopy?"
P.S. Per opening blurb, I'm NOT gonna do this.
I suppose I could use Open ... For Input As File#1 and specify the Module's name, if it's readily available to code, and also Open ... For Output As File#2 for the destination, use a For loop to copy the number of lines, if available, and then Close both. But I hope I get a solution to my problem before I try that since SURELY FileCopy should work within a loop (and doesn't because of improper close).
Thanks to #TimWilliams, who tipped me off to Export, my final "Backup all modules" routine is quite simple.
Sub BackupModules()
Dim comp As VBComponent
Dim prj As VBProject: Set prj = ThisDocument.VBProject
Dim fso As Object: Set fso = CreateObject("Scripting.FileSystemObject")
Dim destPrefix As String: destPrefix = "C:\Users\Dov\Google Drive\Word\Modules\"
Dim destFilePath As String
For Each comp In prj.VBComponents
If comp.Type = vbext_ct_StdModule Then
destFilePath = destPrefix & comp.Name & " " & Year(Now) & " " & Month(Now) & " " & Day(Now)
Debug.Print "Copying Standard module <" & comp.Name & "> to <" & destFilePath & ">"
comp.Export (destFilePath)
Else
Debug.Print "Skipping component # " & k & ", <" & comp.Name & ">, type " & comp.Type
End If
Next
End Sub

How to prevent free distribution of a commercial Excel spreadsheet

I'm not sure if this is more appropriate under a different SE site (Super User?).
I want to build and sell a complex macro driven driven spreadsheet to a certain vertical. I am mainly concerned about free/unauthorised distribution between customers within that vertical.
I can see that there is a few obscure products on the market that might be able to do what I want, but the few reviews that i've been able to find haven't been favourable.
One vendor however lists that free distribution can circumvented by either:
Using a key generator to create license codes
Using the online activation feature
Or by simply using an encrypted password
Is anyone aware of any guidelines/frameworks (any language) for me to build my own solution to achieve this, namely requiring licence codes or online activation?
If this is generally a difficult endeavour, is there a commercial product that anyone recommend?
I'm also thinking the complexities involved in achieving this might push me to building a small SaaS application instead. Am I better off just going that route?
I have created an Excel sheet that I could remotely remove access to if a monthly subscription payment failed. Here is how to accomplish this:
Create and HTML table and upload it to your website
Within your Excel doc go to the data tab and select get from web - import your table into a sheet called "Verify" - make sure your table has 3 columns. Serial Number is in the first column, description of user in 2nd, and your error message in the top of col 3. The error message stored here is what every user that isn't registered will see. The first serial number should appear in cell A2 of the sheet Verify.
Within your Visual Basic editor paste this code into a Module - This code will return an 8 digit serial number based on a PC's Hard Drive serial number:
Function HDSerialNumber() As String
Dim fsObj As Object
Dim drv As Object
Set fsObj = CreateObject("Scripting.FileSystemObject")
Set drv = fsObj.Drives("C")
HDSerialNumber = Left(Hex(drv.SerialNumber), 4) _
& "-" & Right(Hex(drv.SerialNumber), 4)
End Function
Also in another module I make sure the Internet is connected. If no Internet then the sheet closes. If you don't do this then if someone disconnects from the Internet your serials won't be loaded.
Option Explicit
#If VBA7 And Win64 Then
Private Declare PtrSafe Function InternetGetConnectedStateEx Lib "wininet.dll" (ByRef lpdwFlags As Long, ByVal lpszConnectionName As String, ByVal dwNameLen As Integer, ByVal dwReserved As Long) As Long
#Else
Private Declare Function InternetGetConnectedStateEx Lib "wininet.dll" (ByRef lpdwFlags As Long, ByVal lpszConnectionName As String, ByVal dwNameLen As Integer, ByVal dwReserved As Long) As Long
#End If
Function IsInternetConnected() As Boolean
Dim strConnType As String, lngReturnStatus As Long, MyScript As String
If Application.OperatingSystem Like "*Macintosh*" Then
MyScript = "repeat with i from 1 to 2" & vbNewLine
MyScript = MyScript & "try" & vbNewLine
MyScript = MyScript & "do shell script ""ping -o -t 2 www.apple.com""" & vbNewLine
MyScript = MyScript & "set mystatus to 1" & vbNewLine
MyScript = MyScript & "exit repeat" & vbNewLine
MyScript = MyScript & "on error" & vbNewLine
MyScript = MyScript & "If i = 2 Then set mystatus to 0" & vbNewLine
MyScript = MyScript & "end try" & vbNewLine
MyScript = MyScript & "end repeat" & vbNewLine
MyScript = MyScript & "return mystatus"
If MacScript(MyScript) Then IsInternetConnected = True
Else
lngReturnStatus = InternetGetConnectedStateEx(lngReturnStatus, strConnType, 254, 0)
If lngReturnStatus = 1 Then IsInternetConnected = True
End If
End Function
Then inside the Workbook_Open area paste this:
Private Sub Workbook_Open()
If IsInternetConnected Then
Dim objFSO As Object
Dim MyFolder As String
Dim sFileName As String
Dim iFileNum As Integer
Dim sBuf As String
Dim trialstartdate As String
Dim z As String
Dim fsoFSO
Set fsoFSO = CreateObject("Scripting.FileSystemObject")
'UNCOMMENT below to SHOW the serials sheet when the workbook is opened
ActiveWorkbook.Sheets("Verify").Visible = xlSheetVisible
'UNCOMMENT below to hide the serials sheet when the workbook is opened
'ActiveWorkbook.Sheets("Verify").Visible = xlSheetVeryHidden
Refresh_Serials
z = 2
'loop here for valid hard drive serial number
Do Until IsEmpty(Worksheets("Verify").Cells(z, 1).Value)
If Worksheets("Verify").Cells(z, 1).Value = HDSerialNumber Then
'verified and let pass
GoTo SerialVerified
End If
z = z + 1
Loop
Dim custommessage As String
custommessage = Worksheets("Verify").Cells(2, 3)
MsgBox custommessage + " Your serial number is: " + HDSerialNumber
Dim wsh1, MyKey1
Set wsh1 = CreateObject("Wscript.Shell")
MyKey1 = "%{TAB}"
wsh1.SendKeys MyKey1
MsgBox "The Commission Tracker will not open without a valid serial number. It will now close. uncomment this in workbook->open to close the workbook if the serial isn't found"
Application.DisplayAlerts = False
'uncomment this to close the workbook if the serial isn't found
'ActiveWorkbook.Close
Application.DisplayAlerts = True
SerialVerified:
' does the end user agree to not use this tool for mailicous purposes?
MsgAgree = MsgBox("Your PC's serial number is " & HDSerialNumber & ". By clicking 'Yes' you agree to use our software as described in our end user agreement. - the URL to your terms here", vbYesNo, "Final Agreement")
If MsgAgree = vbNo Then
'close program
MsgBox "This program will now close since you do not agree to our end user agreement"
Application.DisplayAlerts = False
ActiveWorkbook.Close
Application.DisplayAlerts = True
Else
'continue to open the program
End If
Else
MsgBox "No Network Connection Detected - You must have an internet connection to run the commission tracker."
Application.DisplayAlerts = False
ActiveWorkbook.Close
Application.DisplayAlerts = True
End If
End Sub
That should do it....
Create your own special unique license keys in a macro that will unlikely be generated in a key generator. Add your own prefix, for example. You could store if a user is using it in an online database. Downfall to this solution is that the users would have to be connected to the outside internet.
Then lock down that module with the keys by the following:
To protect your code, open the Excel Workbook and go to Tools>Macro>Visual Basic Editor (Alt+F11). Now, from within the VBE go to Tools>VBAProject Properties and then click the Protection page tab and then check "Lock project from viewing" and then enter your password and again to confirm it. After doing this you must save, close & reopen the Workbook for the protection to take effect.

How to list DataMacro objects in an Access database?

Is it possible to programmatically enumerate the Data Macros in an Access 2010+ database? If so, how?
Note: Data Macros are trigger-like procedures that are created in the context of the table designer UI. They were new in Acces 2010. They are NOT the same thing as normal macros, which are easy to enumerate.
They have their own new AcObjectType enumeration value : acTableDataMacro, but I can find no other aspect of the Access or DAO object model that refers to them. They do not even appear in the MSysObjects table.
This code will export DataMacro metadata to an XML Document (Source):
Sub DocumentDataMacros()
'loop through all tables with data macros
'write data macros to external files
'open folder with files when done
' click HERE
' press F5 to Run!
' Crystal
' April 2010
On Error GoTo Proc_Err
' declare variables
Dim db As DAO.Database _
, r As DAO.Recordset
Dim sPath As String _
, sPathFile As String _
, s As String
' assign variables
Set db = CurrentDb
sPath = CurrentProject.Path & "\"
s = "SELECT [Name] FROM MSysObjects WHERE Not IsNull(LvExtra) and Type =1"
Set r = db.OpenRecordset(s, dbOpenSnapshot)
' loop through all records until the end
Do While Not r.EOF
sPathFile = sPath & r!Name & "_DataMacros.xml"
'Big thanks to Wayne Phillips for figuring out how to do this!
SaveAsText acTableDataMacro, r!Name, sPathFile
'have not tested SaveAsAXL -- please share information if you do
r.MoveNext
Loop
' give user a message
MsgBox "Done documenting data macros for " & r.RecordCount & " tables ", , "Done"
Application.FollowHyperlink CurrentProject.Path
Proc_Exit:
' close and release object variables
If Not r Is Nothing Then
r.Close
Set r = Nothing
End If
Set db = Nothing
Exit Sub
Proc_Err:
MsgBox Err.Description, , _
"ERROR " & Err.Number _
& " DocumentDataMacros"
Resume Proc_Exit
Resume
End Sub
EDIT: Gord pointed out that you wanted the DataMacros opposed to standard macros. I found some code and tested it (it works) here
I tested the top function when you follow that link and it saves information regarding your table macros for each table in an XML document. It works nicely, props to whoever wrote it.

Delete all files within a directory vb6

I was wondering if anyone could help me with a vb6 function that would delete all files within a directory (excluding subdirectories).
One line, using the VB6 statement Kill
Kill "c:\doomed_dir\*.*"
The help topic says "In Microsoft Windows, Kill supports the use of multiple-character (*) and single-character (?) wildcards to specify multiple files".
As an aside - I prefer to avoid the Microsoft Scripting Runtime (including FileSystemObject). In my experience it's occasionally broken on user machines, perhaps because their IT department are paranoid about viruses.
I believe this should work:
Dim oFs As New FileSystemObject
Dim oFolder As Folder
Dim oFile As File
If oFs.FolderExists(FolderSpec) Then
Set oFolder = oFs.GetFolder(FolderSpec)
'caution!
On Error Resume Next
For Each oFile In oFolder.Files
oFile.Delete True 'setting force to true will delete a read-only file
Next
DeleteAllFiles = oFolder.Files.Count = 0
End If
End Function
I haven't tested every scenario but it should work. It should delete every file and if the file is locked or you don't have access you should get Error 70 which is caught and you get an Abort, Retry or Ignore box.
Sub DeleteAllFilesInDir(ByVal pathName As String)
On Error GoTo errorHandler
Dim fileName As String
If Len(pathName) > 0 Then
If Right(pathName, 1) <> "\" Then pathName = pathName & "\"
End If
fileName = Dir(pathName & "*")
While Len(fileName) > 0
Kill pathName & fileName
fileName = Dir()
Wend
Exit Sub
errorHandler:
If Err.Number = 70 Then
Select Case MsgBox("Could not delete " & fileName & ". Permission denied. File may be open by another user or otherwise locked.", vbAbortRetryIgnore, "Unable to Delete File")
Case vbAbort:
Exit Sub
Case vbIgnore:
Resume Next
Case vbRetry:
Resume
End Select
Else
MsgBox "Error deleting file " & fileName & ".", vbOKOnly Or vbCritical, "Error Deleting File"
End If
End Sub
It would seem that the Scripting runtime FileSystemObject's DeleteFile method also supports wildcards as this works for me:
Dim fs As New Scripting.FileSystemObject
fs.Deletefile "C:\Temp\*.jpg", true
This approach has less control than the approach suggested by #Corazu, but may have some utility in certain cases.