Dim OpenFileName As Variant, tmp As String, i As Long
 Dim ReturnBook As Workbook, TargetBook As Workbook
OpenFileName = Application.GetOpenFilename(FileFilter:="Microsoft Excelブック,*.xls",  MultiSelect:=True)
For i = 1 To UBound(OpenFileName)
  Set TargetBook = Workbooks.Open(OpenFileName(i))
 var val1=TargetBook .Worksheets(1).Range("A1") 
var val2=TargetBook .Worksheets(1).Range("B2") 
TargetBook.Close
Next i