Public Function AddTrustedLocation()
On Error GoTo err_proc
'WARNING:  THIS CODE MODIFIES THE REGISTRY
'sets registry key for 'trusted location'

  Dim intLocns As Integer
  Dim i As Integer
  Dim intNotUsed As Integer
  Dim strLnKey As String
  Dim reg As Object
  Dim strPath As String
  Dim strTitle as string
 
  strTitle = "Add Trusted Location"
  Set reg = CreateObject("wscript.shell")
  strPath = CurrentProject.Path

  'Specify the registry trusted locations path for the version of Access used
  strLnKey = "HKEY_CURRENT_USER\Software\Microsoft\Office\" & Format(Application.Version, "##,##0.0") & _
             "\Access\Security\Trusted Locations\Location"

On Error GoTo err_proc0
  'find top of range of trusted locations references in registry
  For i = 999 To 0 Step -1
      reg.RegRead strLnKey & i & "\Path"
      GoTo chckRegPths        'Reg.RegRead successful, location exists > check for path in all locations 0 - i.
checknext:
  Next
  MsgBox "Unexpected Error - No Registry Locations found", vbExclamation
  GoTo exit_proc
 
 
chckRegPths:
'Check if Currentdb path already a trusted location
'reg.RegRead fails before intlocns = i then the registry location is unused and
'will be used for new trusted location if path not already in registy

On Error GoTo err_proc1:
  For intLocns = 1 To i
      reg.RegRead strLnKey & intLocns & "\Path"
      'If Path already in registry -> exit
      If InStr(1, reg.RegRead(strLnKey & intLocns & "\Path"), strPath) = 1 Then GoTo exit_proc
NextLocn:
  Next
 
  If intLocns = 999 Then
      MsgBox "Location count exceeded - unable to write trusted location to registry", vbInformation, strTitle
      GoTo exit_proc
  End If
  'if no unused location found then set new location for path
  If intNotUsed = 0 Then intNotUsed = i + 1
 
'Write Trusted Location regstry key to unused location in registry
On Error GoTo err_proc:
  strLnKey = strLnKey & intNotUsed & "\"
  reg.RegWrite strLnKey & "AllowSubfolders", 1, "REG_DWORD"
  reg.RegWrite strLnKey & "Date", Now(), "REG_SZ"
  reg.RegWrite strLnKey & "Description", Application.CurrentProject.Name, "REG_SZ"
  reg.RegWrite strLnKey & "Path", strPath & "\", "REG_SZ"
 
exit_proc:
  Set reg = Nothing
  Exit Function
 
err_proc0:
  Resume checknext
 
err_proc1:
  If intNotUsed = 0 Then intNotUsed = intLocns
  Resume NextLocn

err_proc:
  MsgBox err.Description, , strTitle
  Resume exit_proc
 
End Function

14:39, 18 May 2011 (EDT)