How can you move excel worksheets across different excel work books?

Can anyone let me know if there is a way to add one excel workbook’s  excel worksheet  to another excel workbook.
The following is the code I have done. But I am getting an error on the following line
xlApp.Sheets.Move(, xlSheetBranchTemp)

This is the code I am using ---------------->

        Dim xlApp As Excel.Application
        Dim xlBook As Excel.Workbook
        Dim xlSheetTemp As Excel.Worksheet
        xlApp = CreateObject("Excel.Application")
        xlApp.DisplayAlerts = False
        xlBook = xlApp.Workbooks.Open("c:\Test4.xls")


        Dim xlAppBranch As New Excel.Application
        Dim xlBookBranch As Excel.Workbook
        Dim xlSheetBranchTemp As Excel.Worksheet
        xlBookBranch = xlAppBranch.Workbooks.Open("c:\Test5.xls")

        xlSheetBranchTemp = xlAppBranch.ActiveWorkbook.Worksheets(1)
        xlSheetBranchTemp.Select()

        xlApp.Sheets.Move(, xlSheetBranchTemp)

        xlApp.ActiveWorkbook.Worksheets.Item(1).name = "Summary"
        xlApp.ActiveWorkbook.Worksheets.Item(2).name = "Branch1"

        xlBookBranch.Close()
        xlAppBranch = Nothing
        xlBook.SaveAs("c:\Test4.xls")
        xlBook.Close()
        xlApp = Nothing