Check for and fix references automaticaly

[Movian]

So I recently just had a problem on a clients system with their Scripting Runtime Library (scrrun.dll)

We deliver a .ade file (renamed to accdr to more easily work in access run time)

I use FileSystemObjects for checking files, folders etc etc

We had a problem where something un-registered the clients scrrun.dll file on their system causing our system to display a large error regarding not having access to a license for a feature.... (took me 3 hours to track down the problem because of this wonderfully "Descriptive" error)

So what I am wanting to do now is setup an initial reference check and repair system that will be the FIRST item run on start up, as such It will need to ONLY use tools from the basic access VBA systems (I can't use a fso to check if scrrun.dll exists as that is the dll that DOES the checking!)

so what I am looking for is a way to determine if a file exists without using fso, if it doesn't exist I need to find a way to download the file so I can then register it. I currently have a system in place using Micrsofot Internet Controls to downlaod files but could potentially have to repair that too so need to find a way to download a file without using that.

Once the .dll files are downloaded I am fairly sure I can just regsvr32 the .dll file from a shell.

as always any suggestions for approaching this are appreciated (My initial searches have turned up little but I am continuing to search while waiting on responses).

Also thought I would include a short list of my references in case anyone knows of quirks of trying to fix or add them in the way I describe


Visual Basic For Applications (shouldn't have a problem)
Microsoft Access 12.0 Object Library (shouldn't have a problem as its part of the access runtime)
OLE Automation
Microsoft ActiveX Data Objects 2.5 Library
Microsoft DAO 3.6 Object Library
Microsoft Internet Controls
Microsoft Scripting Runtime

[Movian]

ok so I have located a potential option for determining if a file exists.

So now I need to figure out how to download files nativly... (If possible)


Option Compare Database
Option Explicit


Public Function StartupChecks()
'Check for library problems
CheckReferences


'Check and initiate SQL connection
CheckConnection
End Function


Private Sub CheckReferences()
If ScriptingRuntimeExists = False Then
FixScriptingRuntimeReference
End If


End Sub




Private Function ScriptingRuntimeExists() As Boolean
'Check for Scripting Run Time


If (Dir("C:\Windows\System\scrrun.dll") = "") Then
ScriptingRuntimeExists = True
RegisterReference "C:\Windows\System\scrrun.dll"
Exit Function
End If


If (Dir("C:\Windows\System32\scrrun.dll") = "") Then
ScriptingRuntimeExists = True
RegisterReference "C:\Windows\System32\scrrun.dll"
Exit Function
End If


ScriptingRuntimeExists = False
End Function


Private Sub FixScriptingRuntimeReference()
'download .dll file


'register .dll file
RegisterReference "C:\Windows\System\scrrun.dll"
End Sub


Private Sub RegisterReference(sFileName As String)
ShellExecute 0, "runas", "cmd", "/c regsvr32 /s " & """" & sFileName & """", "C:\", 0 'SW_HIDE =0
End Sub

[jonh]

Not sure what good searching for the file would do if it's just unregistered.
If you've created a reference (edit ++ I see you have :-) ) you could check if it's broken.


Dim r As Reference
For Each r In Application.References
If r.IsBroken Then DoFix
Next

Run at startup and if there's a problem
- find the file (you could put a copy in the app folder at install?)
- reregister
- display message that the app needs to restart.