Multiple Instances of Excel

First time poster of this site.... be gentle

I am trying to work in multiple instances of excel, but am having no luck in using vb code in my activated instance. This is my code:

PHP Code: 

For Each process In GetObject("winmgmts:{impersonationLevel=impersonate}").InstancesOf("Win32_process ")
        If process.Name = "EXCEL.EXE" Then
            'MsgBox process.Handle
            count = 0
            hand = process.Handle
            AppActivate (hand)
            'SendKeys ("{DOWN}"), True
            For Each wkb In Workbooks
                If Windows(wkb.Name).Visible Then
                   book(count) = wkb.Name
                End If
                count = count + 1
            Next
        End If
    Next
MsgBox book(0) & book(1) & book(2) & book(3) & book(4) & book(5) & book(6)

End Sub 


I can send keystrokes to the activated app, but I can't seem to perform any coded functions on it. Instead it just performs the code on the instance that the code resides in.

Any help would be great..

Thanks.