Reopening recently closed instances of Excel - vba

Question

If I use the below code to close all instances of Excel that are currently open what would I need to use to reopen all the instances of Excel that were just closed? I know I'll have to change the below to save a filepath somewhere but just not sure what the actual code should be.
Public Sub CloseAllExcel()
On Error GoTo handler
Dim xl As Excel.Application
Dim wb As Excel.Workbook
Do While xl Is Nothing
Set xl = GetObject(, "Excel.Application")
For Each wb In xl.Workbooks
wb.Save
wb.Close
Next
xl.Quit
Set xl = Nothing
Loop
Exit Sub
handler:
If Err <> 429 Then 'ActiveX component can't create object
MsgBox Err.Description, vbInformation
End If
End Sub

Answer 1

This stores file paths of the workbooks to a text file. If you run this macro with False as the input, this will open all of the recently closed files. (Not tested)
Public Sub CloseAllExcel(Closing As Boolean)
On Error GoTo handler
Dim xl As Excel.Application
Dim wb As Excel.Workbook
Dim strPath As String
strPath = "C:\path.txt"
If Close Then
Dim fso as Object
Set fso = CreateObject("Scripting.FileSystemObject")
Dim oFile as Object
Set oFile = FSO.CreateTextFile(strPath)
Do While xl Is Nothing
Set xl = GetObject(, "Excel.Application")
For Each wb In xl.Workbooks
oFile.WriteLine Application.ActiveWorkbook.FullName
wb.Save
wb.Close
Next
oFile.Close
Set fso = Nothing
Set oFile = Nothing
xl.Quit
Set xl = Nothing
Loop
Exit Sub
Else
Dim FileNum As Integer
Dim DataLine As String
FileNum = FreeFile()
Open strPath For Input As #FileNum
While Not EOF(FileNum)
Line Input #FileNum, DataLine
Workbooks.Open DataLine
Wend
Exit Sub
End If
handler:
If Err <> 429 Then 'ActiveX component can't create object
MsgBox Err.Description, vbInformation
End If
End Sub

Answer 2

You could use a Very-Hidden worksheet, where you'll keep all of the Files currently open.
Note: If you want there is an option to Save and Read for the Registry.
Sub CloseAllExcel Code:
Option Explicit
Public Sub CloseAllExcel()
On Error GoTo handler
Dim xlApp As Excel.Application
Dim wb As Excel.Workbook
Dim i As Long
Dim Hidws As Worksheet
On Error Resume Next
Set Hidws = ThisWorkbook.Worksheets("Admin")
On Error GoTo 0
If Hidws Is Nothing Then ' check if there isn't "Admin" sheet exists in the workbook
Set Hidws = ThisWorkbook.Sheets.Add(Before:=ThisWorkbook.Worksheets(Worksheets.Count))
Hidws.Name = "Admin"
Hidws.Visible = xlSheetVeryHidden ' make the "Admin" sheet very-hidden
End If
i = 1
Do While xlApp Is Nothing
Set xlApp = GetObject(, "Excel.Application")
For Each wb In xlApp.Workbooks
Hidws.Range("A" & i).Value = wb.FullName ' save each workbook full name and path in column "A" in "Admin" very-hidden sheet
i = i + 1
wb.Close True
Next
xlApp.Quit
Set xlApp = Nothing
Loop
Exit Sub
handler:
If Err <> 429 Then 'ActiveX component can't create object
MsgBox Err.Description, vbInformation
End If
End Sub
Sub RestoreExcelLastSession Code: reads the files (names and Path) from Column "A" in "Admin" very-hidden sheet.
Sub RestoreExcelLastSession()
Dim xlApp As Excel.Application
Dim wb As Excel.Workbook
Dim i As Long
Dim Hidws As Worksheet
On Error Resume Next
Set Hidws = ThisWorkbook.Worksheets("Admin")
On Error GoTo 0
If Hidws Is Nothing Then ' check if "Admin" sheet exists
MsgBox "No Files have been restored"
Exit Sub
End If
i = 1
Do While Hidws.Range("A" & i).Value <> "" ' loop through cells in Column "A"
Set xlApp = CreateObject("Excel.Application") ' open a new Excel instance per file
xlApp.Workbooks.Open (Hidws.Range("A" & i).Value)
i = i + 1
Set xlApp = Nothing
Loop
End Sub