This should disable the popup on the status bar:

VB Code:
  1. Application.CommandBars("AutoCalculate").Enabled = False
As you can see, that applies to the whole application. If you just want it disabled for a workbook you can use that code to toggle it in the Workbook Activate/Deactivate events.

For more info on working with CommandBars (like adding controls, etc.) see the Excel VBA help file topic "CommandBar Object".

I don't have any popups on the scrollbars (Excel 2000). There is probably some documentation of all the built-in CommandBars somewhere, but I just use the code below to find the CommandBar name. Kepp in mind that if a letter is underlined, that means there is an amersand before the letter in the actual control caption.

VB Code:
  1. Sub FindCommandBar()
  2.  
  3.     Dim cb As CommandBar
  4.     Dim cbc As CommandBarControl
  5.     Dim strControlCaption As String
  6.    
  7.     strControlCaption = "&None"
  8.  
  9.     For Each cb In Application.CommandBars
  10.         For Each cbc In Application.CommandBars(cb.Name).Controls
  11.             If cbc.Caption = strControlCaption Then
  12.                 Debug.Print cb.Name
  13.                 Exit For
  14.             End If
  15.         Next cbc
  16.     Next cb
  17.  
  18. End Sub