copy information to an external workbook - vba

Question

I am writing a macro where I take data from a CSV and copy it to another Excel file (not the current or active file).
What is the code to take the copied data and send it to another file in the same directory.
This is my code, I have commented out the lines that cause the macro not to work. I want to set the variable wshT to Sheet1 of the WTF.xlsx file, which is in the same directory but not the active workbook. I have not opened that one. So the goal is to use this macro to copy extra data from the CSV and send it to the WTF.xlsx file and save it as something new, in this case "BBB". Any help is much appreciated. When I uncomment those lines, errors pop up.
Sub Import()
Dim MyPath As String
Dim strFileName As String
'Dim strFileName1 As String
MyPath = ActiveWorkbook.Path
strFileName = MyPath & "\borgwich_die_BM1940_profile.csv"
'strFileName1 = Workbooks("WTF.xlsx").Activate
'strFileName1 = Workbooks("WTF.xlsx").Worksheets("Sheet1").Select
Dim wbkS As Workbook
Dim wshS As Worksheet
Dim wshT As Worksheet
'Set wshT = strFileName1
Set wbkS = Workbooks.Open(Filename:=strFileName)
Set wshS = wbkS.Worksheets(1)
wshS.Range("A1:A3").EntireRow.Delete
'wshS.UsedRange.Copy Destination:=wshT.Range("A1")
wbkS.Close SaveChanges:=False
Application.DisplayAlerts = False
ActiveWorkbook.SaveAs Filename:=MyPath & "\BBB", FileFormat _
:=51, CreateBackup:=False
Application.DisplayAlerts = False
'ActiveWindow.Close
End Sub

Answer 1

Your use of value assignment to strFileName1 through the use of .Activate and/or .Select was bad methodology. If WTF.xlsx is open, you can directly reference its Sheet1 and Set a worksheet object reference to a variable.
Sub Import()
Dim MyPath As String, strFileName As String
Dim wbkS As Workbook, wshS As Worksheet, wshT As Worksheet
MyPath = ActiveWorkbook.Path
strFileName = MyPath & "\borgwich_die_BM1940_profile.csv"
Set wbkS = Workbooks.Open(Filename:=strFileName)
Set wshS = wbkS.Worksheets(1)
Set wshT = Workbooks("WTF.xlsx").Worksheets("Sheet1")
wshS.Range("A1:A3").EntireRow.Delete
With wshS.Cells(1, 1).CurrentRegion
.Copy Destination:=wshT.Range("A1")
End With
wbkS.Close SaveChanges:=False
Application.DisplayAlerts = False
wshT.Parent.SaveAs Filename:=MyPath & "\BBB", FileFormat:=51, CreateBackup:=False
wshT.Parent.Close SaveChanges:=False
Application.DisplayAlerts = True
End Sub
Another alternative would be to use the VBA equivalent of Data ► Get External Data ► From Text but you should probably know the number and type of fields being brought in with the CSV beforehand. This is certainly the preferred method if the CSV data is being incorrectly interpreted by the temp worksheet you are creating by opening the CSV as a workbook.