VBA Counter to increment subject lines by 1 - vba

Question

I am trying to create a macro which will save out all emails of a selected folder within outlook2010 to my desktop, the code below exports the emails to a specified location but any emails that have the same subject/timestamp are overwritten.
Can I get some advice on how to resolve this issue please.
Option Explicit
Dim StrSavePath As String
Sub SaveAllEmails_ProcessAllSubFolders()
Dim i As Long
Dim j As Long
Dim n As Long
Dim StrSubject As String
Dim StrName As String
Dim StrFile As String
Dim StrReceived As String
Dim StrFolder As String
Dim StrSaveFolder As String
Dim StrFolderPath As String
Dim iNameSpace As NameSpace
Dim myOlApp As Outlook.Application
Dim SubFolder As MAPIFolder
Dim mItem As MailItem
Dim FSO As Object
Dim ChosenFolder As Object
Dim Folders As New Collection
Dim EntryID As New Collection
Dim StoreID As New Collection
Set FSO = CreateObject("Scripting.FileSystemObject")
Set myOlApp = Outlook.Application
Set iNameSpace = myOlApp.GetNamespace("MAPI")
Set ChosenFolder = iNameSpace.PickFolder
If ChosenFolder Is Nothing Then
GoTo ExitSub:
End If
BrowseForFolder StrSavePath
Call GetFolder(Folders, EntryID, StoreID, ChosenFolder)
For i = 1 To Folders.Count
StrFolder = StripIllegalChar(Folders(i))
n = InStr(3, StrFolder, "\") + 1
StrFolder = Mid(StrFolder, n, 256)
StrFolderPath = StrSavePath & "\" & StrFolder & "\"
StrSaveFolder = Left(StrFolderPath, Len(StrFolderPath) - 1) & "\"
If Not FSO.FolderExists(StrFolderPath) Then
FSO.CreateFolder (StrFolderPath)
End If
Set SubFolder = myOlApp.Session.GetFolderFromID(EntryID(i), StoreID(i))
On Error Resume Next
For j = 1 To SubFolder.Items.Count
Set mItem = SubFolder.Items(j)
StrReceived = Format(mItem.ReceivedTime, "YYYYMMDD-hhmmss")
StrSubject = mItem.Subject
StrName = StripIllegalChar(StrSubject)
StrFile = StrSaveFolder & StrReceived & "_" & StrName & ".msg"
StrFile = Left(StrFile, 256)
mItem.SaveAs StrFile, 3
Next j
On Error GoTo 0
Next i
ExitSub:
End Sub
Function StripIllegalChar(StrInput)
Dim RegX As Object
Set RegX = CreateObject("vbscript.regexp")
RegX.Pattern = "[\" & Chr(34) & "\!\#\#\$\%\^\&\*\(\)\=\+\|\[\]\{\}\`\'\;\:\<\>\?\/\,]"
RegX.IgnoreCase = True
RegX.Global = True
StripIllegalChar = RegX.Replace(StrInput, "")
ExitFunction:
Set RegX = Nothing
End Function
Sub GetFolder(Folders As Collection, EntryID As Collection, StoreID As Collection, Fld As MAPIFolder)
Dim SubFolder As MAPIFolder
Folders.Add Fld.FolderPath
EntryID.Add Fld.EntryID
StoreID.Add Fld.StoreID
For Each SubFolder In Fld.Folders
GetFolder Folders, EntryID, StoreID, SubFolder
Next SubFolder
ExitSub:
Set SubFolder = Nothing
End Sub
Function BrowseForFolder(StrSavePath As String, Optional OpenAt As String) As String
Dim objShell As Object
Dim objFolder ' As Folder
Dim enviro
enviro = CStr(Environ("USERPROFILE"))
Set objShell = CreateObject("Shell.Application")
Set objFolder = objShell.BrowseForFolder(0, "Please choose a folder", 0, enviro & "\Desktop\")
StrSavePath = objFolder.self.Path
On Error Resume Next
On Error GoTo 0
ExitFunction:
Set objShell = Nothing
End Function

Answer 1

You can try function
Function FileExists(file as String) as Boolean
If Not Dir(file, vbDirectory) = vbNullString Then
Return True
Else
Return False
End If
End Function
This way you can loop and add a suffix to the filename
[your code]
Dim count as Integer = 0
While (FileExists(file))
count = count + 1
file = dir & filename & count & extension
End While
It will exit the loop as soon as it finds an available name