How to get the sheet name using GetOpenFilename in VLOOKUP - vba

Question

I am using this code down below to use a VLOOKUP in another file that you select using the GetOpenFilename. I want shtName to be the name of the sheet in the file that you select, but whenever I step through it, it is always the name of the sheet that I am working in and putting the VLOOKUP in.
I have shtName in my VLOOKUP and it doesn't show anything when I step through it. X shows the filename and path, but shtName right after shows nothing. But my VLOOKUP ends up working anyway and it puts the sheet in the formula.
Why is that? I want to be able to do it myself and so I know I get the sheet name from the file you are selecting.
Dim iRet As Integer
Dim strPrompt As String
Dim strTitle As String
' Promt
strPrompt = "Please select the last Kronos Full File before the dates of this HCM Report." & vbCrLf & _
"This will be used to find the Old Position, Org Unit, and Old Cost Center." & vbCrLf & _
"For example, if the date of this report is 7-28-17 thru 8-25-17, the closest Kronos Full File you would want to use is 7-27-17."
' Dialog's Title
strTitle = "Last Kronos Full File for Old Positions"
'Display MessageBox
iRet = MsgBox(strPrompt, vbOK, strTitle)
Dim LR As Long
Dim X As String
Dim lNewBracketLocation As Long
X = Application.GetOpenFilename( _
FileFilter:="Excel Files (*.xls*),*.xls*", _
Title:="Choose the Kronos Full File.", MultiSelect:=False)
MsgBox "You selected " & X
'Find the last instance in the string of the path separator "\"
lNewBracketLocation = InStrRev(X, Application.PathSeparator)
'Edit the string to suit the VLOOKUP formula - insert "["
X = Left$(X, lNewBracketLocation) & "[" & Right$(X, Len(X) - lNewBracketLocation)
shtName = ActiveWorkbook.Worksheets(1).name
LR = Range("E" & Rows.Count).End(xlUp).Row
Range("T2").Formula = "=VLOOKUP($E2,'" & X & "]shtName'!$B$1:$AP$99999,15,0)"
Stop
Range("T2").AutoFill Destination:=Range("T2:T" & Range("E" & Rows.Count).End(xlUp).Row)
Stop
Range("T2:T" & Range("E" & Rows.Count).End(xlUp).Row).Select
Stop
Range("U2").Formula = "=VLOOKUP($E2,'" & X & "]shtName'!$B$1:$AP$99999,41,0)"
Range("U2").AutoFill Destination:=Range("U2:U" & Range("E" & Rows.Count).End(xlUp).Row)
Range("U2:U" & Range("E" & Rows.Count).End(xlUp).Row).Select
Range("V2").Formula = "=VLOOKUP($E2,'" & X & "]shtName'!$B$1:$AP$99999,18,0)"
Range("V2").AutoFill Destination:=Range("V2:V" & Range("E" & Rows.Count).End(xlUp).Row)
Range("V2:V" & Range("E" & Rows.Count).End(xlUp).Row).Select
Cells.Select
Cells.EntireColumn.AutoFit

Answer 1

Something like the following should give you the worksheets name out of a file
Dim wbk As Workbook
Set wbk = Workbooks.Open(Filename:="YOUR_FILE_PATH", ReadOnly:=True)
Dim shtName As String
shtName = wbk.Worksheets(1).Name
wbk.Close
Note: We can open the workbook in read only mode if we don't plan to change anything.
Additionally I recommend (for a good code following good practices):
Always specify a worksheet.
Eg for every Range("") like Worksheets("YourSheetName").Range("")
Or use With statements:
With Worksheets("YourSheetName")
.Range("A1").Value = 5 'recognize the starting full stop referring to the with statement
End With
Same for every Rows, Columns, Cells, etc.
Avoid using .Select, .Activate and Selection. at all.
(there are many tutorials out there in the Internet how to avoid them).
Use Option Explicit and declare all your variables before use.
(avoids many issues, especially typos).