Outlook Not Running Visual Basic After Restart - vba

Question

So I have created a visual basic script in outlook that creates a random signature by pulling from Git.
The script works correctly but whenever I restart my machine the script doesn't run at all.
I fixed the issue by going to
"File"->"Options"->"Trust Center"->"Trust Center Settings..."->"Macro Settings"->"Enable all macros"
This let the VBA code work whenever I opened and closed Outlook but is there a better way to have the code work whenever I reopen Outlook or restart my machine.
I have tried to use
Private Sub Application_Startup()
MsgBox "Hi"
End Sub
While that code did work when I first put it in, whenever I restarted outlook it said it couldn't run because "Macros were disabled"
Here is my code for the random signature, anyway to have this work whenever I restart outlook or my machine? Or is the macro setting I edited the correct way to go?
Sub Application_ItemSend(ByVal Item As Object, Cancel As Boolean)
' Validate that the item sent is an email.
If Item.Class <> olMail Then Exit Sub
'These first variables is to find the file the .bat file created within the AppData folder
'Set enviro to %APPDATA%
Dim enviro As String
enviro = CStr(Environ("APPDATA"))
'Create a new variable that sets the file path for the RepoDir.txt
RepoPath = enviro & "\RepoDir.txt"
'Create a new variable to grab the line of text in RepoDir.txt
Dim RepoFilePath As String
Dim strFirstLine As String
'The new variable calls the RepoPath Variable, opens it and reads the first line of the file and copies it into a variable
RepoFilePath = RepoPath
Open RepoFilePath For Input As #1
Line Input #1, strFirstLine
Close #1
'The script runs a Shell command that opens the command line, cds to the Repo path within the str variable, does a git pull, and outputs the error level to a file in the temp directory
Shell ("cmd /c cd " & strFirstLine & " & git pull RandomSig & echo %ERRORLEVEL% > %TEMP%\gitPull.txt 2>&1")
'These second set of variables is to find the file the Shell command created within the TEMP folder
'Set enviro to %TEMP%
Dim Gitenviro As String
Gitenviro = CStr(Environ("TEMP"))
'Create a new variable that sets the file path for the RepoDir.txt
PullResult = Gitenviro & "\gitPull.txt"
'Create a new variable to grab the line of text in RepoDir.txt
Dim GitFilePath As String
Dim GitFirstLine As String
'The new variable calls the PullResult Variable, opens it and reads the first line of the file and copies it into a variable
GitFilePath = PullResult
Open GitFilePath For Input As #2
Line Input #2, GitFirstLine
Close #2
'MsgBox (GitFirstLine)
'The variable is checked to see if it does not equal 0, and if it doesn't the message is cancelled
If GitFirstLine <> 0 Then
MsgBox "There was an error when attempting to do the Git Pull, cancelling message"
Cancel = True
End If
Const SearchString = "%Random_Line%"
Dim QuotesFile As String
QuotesFile = strFirstLine & "quotes.txt"
If InStr(Item.Body, SearchString) Then
If FileOrDirExists(QuotesFile) = False Then
MsgBox ("Quotes file wasn't found! Canceling message")
Cancel = True
Else
Dim lines() As String
Dim numLines As Integer
numLines = 0
' Open the file for reading
Open QuotesFile For Input As #1
' Go over each line in the file and save it in the array + count it
Do Until EOF(1)
ReDim Preserve lines(numLines + 1)
Line Input #1, lines(numLines)
numLines = numLines + 1
Loop
Close #1
' Get the random line number
Dim randLine As Integer
randLine = Int(numLines * Rnd()) + 1
' Insert the random quote
Item.HTMLBody = Replace(Item.HTMLBody, SearchString, lines(randLine))
Item.HTMLBody = Replace(Item.HTMLBody, "%Random_Num%", randLine)
End If
End If
End Sub
Function FileOrDirExists(PathName As String)
Dim iTemp As Integer
On Error Resume Next
iTemp = GetAttr(PathName)
Select Case Err.Number
Case Is = 0
FileOrDirExists = True
Case Else
FileOrDirExists = False
End Select
On Error GoTo 0
End Function

Answer 1

It’s highly recommended to leave your macro security setting to only allow self-sign certificate Macros,
Do not use the Low option or run all
Create a self-signing certificate
Go to Start > All Programs > Microsoft Office > Microsoft Office Tools, and then click Digital Certificate for VBA Projects.
In the Your certificate's name box, type in name for the certificate.
Click OK. then SelfCert Success message will appears, click OK.
Go to Developer tab > click Visual Basic. or ALT+F11
In Visual Basic Editor, go to Tools > Digital Signature.
Digital Signature dialog appears and click on Choose and you’ll get a screen to select a certificate. Now you can choose the certificate you just created.
Edit
locating SelfCert.exe
Go to Start menu and typing VBA should bring up the SelfCert.exe.
Alternative method of locating SelfCert.exe
if you Can’t find it in the Start Menu? then By default you can find SelfCert.exe in the following location
Windows 32-bit
C:\Program Files\Microsoft Office\Office <version number>
Windows 64-bit with Office 32-bit
C:\Program Files (x86)\Microsoft Office\Office <version number>
Windows 64-bit with Office 64-bit
C:\Program Files\Microsoft Office\Office <version number>
Office 365 (Subscription based or Click-to-Run version of Office 2013)
C:\Program Files\Microsoft Office 15\root\office15
If SelfCert.exe is not installed
Then run Office setup and choose Add or Remove Features.
With older versions of Office you’ll need to choose Custom installation and then Advanced customization.
Expand the Office Shared Features section and select Digital Certificate for VBA Projects to run from your computer.
Simply run SelfCert.exe after locating it.