Shyam Pillai has a nice piece of PP code to turn off screen updating:

http://skp.mvps.org/ppt00033.htm

Does anyone know the Office 2016 (16.0) class name? I guessed at some but I guess I'm not a good guesser.

I do get a hwnd, but it fails on LockWindowUpdate



Get handle to the main application window using ClassName
        Select Case VersionNo
        Case "8"  ' For PPT97:
            hwnd = FindWindow("PP97FrameClass", 0&)
        Case "9"  ' For PPT2K:
            hwnd = FindWindow("PP9FrameClass", 0&)
        Case "10" ' For XP:
            hwnd = FindWindow("PP10FrameClass", 0&)
        Case "11" ' For 2003:
            hwnd = FindWindow("PP11FrameClass", 0&)
        Case "12" ' For 2007:
            hwnd = FindWindow("PP12FrameClass", 0&)
        Case "14" ' For 2010:
            hwnd = FindWindow("PPTFrameClass", 0&)
        Case "15" ' For 2013:
            hwnd = FindWindow("PPTFrameClass", 0&)
        Case "16" ' For 2016: -------------------------------------------------------------------- my guess
            hwnd = FindWindow("PPTFrameClass", 0&)
        Case Else
            Err.Raise Number:=vbObjectError + ERR_VERSION_NOT_SUPPORTED, _
            Description:="Newer version."
            Exit Property
        End Select

        If hwnd = 0 Then
            Err.Raise Number:=vbObjectError + ERR_NO_WINDOW_HANDLE, _
            Description:="Unable to get the PowerPoint Window handle"
            Exit Property
        End If

        If LockWindowUpdate(hwnd) = 0 Then
            Err.Raise Number:=vbObjectError + ERR_WINDOW_LOCK_FAIL, _
            Description:="Unable to set a PowerPoint window lock"
            Exit Property
        End If