Hyperlink to fire macro in personal.xlsb - vba

Question

I am having a column in an excel with some text(date, sender,subject) which refer to an email. The problem is that(as far as I know) you can hyperlink to an outlook email in public folders, because the email might move(link varies from pc to pc).
So my idea to obtain that email is to make a hyper link that fires of a macro in the personal.xlsb, that then search for that email and display it.
My only problem is that I can not figure out how to link text to start a macro, Worksheet_FollowHyperlink means that I need to put that code in the sheet where my text is.
I guess I could do that, but this implements that I need to create this code when the workbook is opened and remove it when the workbook is closed, unless I have to rename all the files xlsx to xlsm, and because I am unsure if other colleagues have link to the excel sheet I would like to avoid doing so.
So my question is, is there any way to make a hyperlink to personal.xlsb!ShowEmail(cellValue) ? Or is it possible to make direct link to the email in the public folder? Below is the code for creating the email text:
Function getEpostField(projectNumber As String, drawingNumber As String, partNumber As String) As String
On Error Resume Next
Dim myFolderArray() As String
Dim i As Long
Dim j As Long
Dim k As Long
Dim OutApp As Object
Dim myNameSpace As Object
Dim myFolder As Object
Dim myNewFolder As Object
Dim TopPublicFolder As Object
Dim olMail As Variant
Dim myTasks
Dim strFilter As String
Set OutApp = CreateObject("Outlook.Application")
Set myNameSpace = OutApp.GetNamespace("MAPI")
Set TopPublicFolder = myNameSpace.GetDefaultFolder(18)
getEpostField = ""
' array with all subfolders where the item might be...
myFolderArray = Post.helpRequest("XXXXXXXXX")
For i = LBound(myFolderArray) To UBound(myFolderArray)
Set myFolder = TopPublicFolder.Folders("Prototech").Folders(myFolderArray(i, 2)).Folders
For j = 1 To myFolder.Count
If InStr(myFolder(j).Name, projectNumber) Then
If drawingNumber <> "" And partNumber <> "" Then
strFilter = "#SQL=" & Chr(34) & "urn:schemas:httpmail:textdescription" & Chr(34) & " like '%" & drawingNumber & "%' " _
& "or " & Chr(34) & "urn:schemas:httpmail:subject" & Chr(34) & " like '%" & drawingNumber & "%'" _
& "or " & Chr(34) & "urn:schemas:httpmail:attachmentfilename" & Chr(34) & " like '%" & drawingNumber & "%'" _
& "or " & Chr(34) & "urn:schemas:httpmail:textdescription" & Chr(34) & " like '%" & partNumber & "%' " _
& "or " & Chr(34) & "urn:schemas:httpmail:subject" & Chr(34) & " like '%" & partNumber & "%'" _
& "or " & Chr(34) & "urn:schemas:httpmail:attachmentfilename" & Chr(34) & " like '%" & partNumber & "%'"
ElseIf drawingNumber <> "" Then
strFilter = "#SQL=" & Chr(34) & "urn:schemas:httpmail:textdescription" & Chr(34) & " like '%" & drawingNumber & "%' " _
& "or " & Chr(34) & "urn:schemas:httpmail:subject" & Chr(34) & " like '%" & drawingNumber & "%'" _
& "or " & Chr(34) & "urn:schemas:httpmail:attachmentfilename" & Chr(34) & " like '%" & drawingNumber & "%'"
ElseIf partNumber <> "" Then
strFilter = "#SQL=" & Chr(34) & "urn:schemas:httpmail:textdescription" & Chr(34) & " like '%" & partNumber & "%' " _
& "or " & Chr(34) & "urn:schemas:httpmail:subject" & Chr(34) & " like '%" & partNumber & "%'" _
& "or " & Chr(34) & "urn:schemas:httpmail:attachmentfilename" & Chr(34) & " like '%" & partNumber & "%'"
Else
getEpostField = "No emails found"
Exit Function
End If
Set filteredItems = myFolder(j).Items.Restrict(strFilter)
If filteredItems.Count = 0 Then
Debug.Print "No emails found"
getEpostField = "No emails found"
found = False
Else
found = True
' this loop is optional, it displays the list of emails by subject.
For Each itm In filteredItems
attachmentString = ""
If itm.Attachments.Count > 0 Then
For Each temp In itm.Attachments
temp2 = InStr(temp.filename, drawingNumber)
If temp2 > 0 Then
attachmentString = attachmentString & temp.filename & " "
End If
Next temp
End If
Debug.Print "Dato:" & Format(itm.CreationTime, "mm.dd.yyyy") & " Subject:" & itm.Subject & " From:" & itm.SenderName & " Attachment:" & attachmentString
getEpostField = getEpostField + "Dato:" & Format(itm.CreationTime, "mm.dd.yyyy") & " Subject:" & itm.Subject & " From:" & itm.SenderName & " Attachment:" & attachmentString
Next
End If
'If the subject isn't found:
If Not found Then
'NoResults.Show
Else
Debug.Print "Found " & filteredItems.Count & " items."
End If
Exit Function
End If
Next j
Next i
End Function

Answer 1

=HYPERLINK("#personal.xlsb!modUtility.TestHL()","Test")
and a test function (returning a range a just results in the link selecting the already-selected cell)
Function TestHL()
Debug.Print "OK"
Set TestHL = Selection
End Function