Opening a workbook with VBA/macro is making it read only? - vba

Question

I would like my code to open a workbook (always the same one), detect the first free row, write to just two cells in that row, and then save/close the workbook. This seems like a simple problem, but the macro seems to be opening a copy of the file, and then locking it for editing.
Can you see any errors in my open code? I know that the file opens and that the row search works, but then it 1. never writes to the cells, and 2. locks the file.
Function WriteToMaster(Num, Path) As Boolean
'Declare variables
Dim xlApp As Excel.Application
Dim wb As Workbook
Dim ws As Worksheet
Dim infoLoc As Long
Set xlApp = New Excel.Application
'Specifies where the Master Move Key is stored
Set wb = xlApp.Workbooks.Open("DOC LOCATION")
Set ws = wb.Worksheets("Sheet1")
'Loop through cells, looking for an empty one, and set that to the loan number
infoLoc = firstBlankRow(ws)
MsgBox "First blank row is " & infoLoc & ". Num is " & Num
ws.Cells(infoLoc, 1).Value = Num
ws.Cells(infoLoc, 2).Value = Path
'Save, close, and quit
wb.Save
wb.Close
xlApp.Quit
'Resets the variables
Set ws = Nothing
Set wb = Nothing
Set xlApp = Nothing
'pieces of function from http://p2p.wrox.com/vb-how/30-read-write-excel-file-using-vb6.html
End Function
Thank you again, stackoverflow <3

Answer 1

Do you need to open a new excel app just to open a workbook?
Can't you just do something like this:
Sub Macro1()
Dim wkb As Workbook
Workbooks.Open Filename:="\User Documents$\bob\My Documents\workbook_open_example.xlsx"
Set wkb = Workbooks("workbook_open_example.xlsx")
End Sub