vba to go to a web page already open and zoom it to 150%

[cjcass]

Hi,
I have the code below that opens up a new instance of google.com and maximises the screen.
How could this be adapted to; (a) go to an instance of google.com that is already open and (b) zoom the web page to 150%?
Any help much appreciated.

Private Declare PtrSafe Function ShowWindow Lib "user32" (ByVal hwnd As Long, ByVal nCmdSHow As Long) As Long


Sub Test()
    
    Dim IE As Object
    Set IE = CreateObject("internetexplorer.application")
    ShowWindow IE.hwnd, 3
    IE.Navigate "http://www.google.com"
    
    Do While IE.Busy: DoEvents: Loop
    Do While IE.readyState <> 4: DoEvents: Loop
    
End Sub