[2005 Win App] Assigning a filename to a workbook

I have an excel file myExcel.xls which consisting of data. I have declared an Excel workbook programatically as follows:

<vb> Code:

[HTML]
Dim newFile As Excel.Application
newFile = New Excel.Application
newFile.Visible = True
 
newFile.Workbooks.Add()
newFile.Workbooks(1).Activate()
[/HTML]

Can anyone show me how to assign myExcel.xls to newFile? Thanks