Read closed .xlsm files as xml files to pull data - vba

Question

I am a new programmer and I am trying to find a way to extract one range of data from multiple workbooks and copy them into a master file. I have already wrote the code to do this below, but the problem that I am having is that my code physically opens the xlsm files > copies the data > then goes back into the master file to paste. Since this is being done to thousands of files at once, it takes hours to complete. My boss told me there is a way to copy the data from the xlsm files without having the code actually open the file if it is read as xml or as a .txt file. I have searched online for this, but cannot find anything on how this would be done. Any help would be greatly appreciated.
The code I have that physically opens the workbooks:
Option Explicit
Sub ReadDataFromCloseFile()
On Error GoTo ErrHandler
Application.EnableEvents = False
Application.ScreenUpdating = False
Dim FileType As String
Dim FilePath As String
FileType = "*.xlsm*" 'The file type to search for
FilePath = "C:\Users\hasib\xlsm's\" 'The folder to search
Dim src As Workbook
Dim OutputCol As Variant
Dim Curr_File As Variant
OutputCol = 9 'The first row of the active sheet to start writing to
Curr_File = Dir(FilePath & FileType)
Do Until Curr_File = ""
' OPEN THE SOURCE EXCEL WORKBOOK IN "READ ONLY MODE".
Set src = Workbooks.Open(FilePath & Curr_File, True, True)
Sheets("Reporting").Range("I7:I750").Copy
Workbooks("Master.xlsm").Activate
Sheets("Sheet2").Select
Sheets("Sheet2").Cells(4, OutputCol).Select
ActiveCell.PasteSpecial Paste:=xlPasteValuesAndNumberFormats
Application.CutCopyMode = False
OutputCol = OutputCol + 1
' CLOSE THE SOURCE FILE.
src.Close False ' FALSE - DON'T SAVE THE SOURCE FILE.
Curr_File = Dir
Loop
Set src = Nothing
Application.EnableEvents = True
Application.ScreenUpdating = True
ErrHandler:
Application.EnableEvents = True
Application.ScreenUpdating = True
End Sub

Answer 1

I found out that there is a formula you can use in a cell that will pull in data from a closed workbook. If you type ='folderpath[filename]Sheetname'Cell into a cell it will automatically pull in that information. Using this logic I created the below to loop through all my files and paste data into my workbook from the files being called:
Set fd = Application.FileDialog(msoFileDialogFilePicker)
fd.InitialFileName = "c:\"
fd.InitialView = msoFileDialogViewList
fd.AllowMultiSelect = True
FileChosen = fd.Show
FilePath = fd.SelectedItems(1)
FolderPath = Left(FilePath, InStrRev(FilePath, "\"))
If FileChosen = -1 Then
'open each of the files chosen
For c = 1 To fd.SelectedItems.count
FileName = Dir(fd.SelectedItems(c))
ThisWorkbook.Sheets("Batch Results").Cells(OutputRow, OutputCol).Formula = "='" & FolderPath & "[" & FileName & "]Reporting'!$I7"
OutputCol = OutputCol + 1
Next c
End If
ThisWorkbook.Sheets("Batch Results").Select
Cells(1, OutputCol).Select
EndColumn = Split(ActiveCell(1).Address(1, 0), "$")(0)
RangeName = ("A1:" & EndColumn & "1")
Range(RangeName).Select
Selection.AutoFill Destination:=Range("A1:" & EndColumn & "558"), Type:=xlFillDefualt