Is there an upper limit to the number of non-contiguous cells Excel can hold
in a range object? The Address property fatigues at 256 characters, but I
could get no indication from Cells.Count that there is any upper limit
(perhaps I ran out of patience)


1000 increment 00:00:03 total time = 00:00:03
2000 increment 00:00:25 total time = 00:00:27
3000 increment 00:01:05 total time = 00:01:32
4000 increment 00:02:06 total time = 00:03:38
5000 increment 00:03:10 total time = 00:06:48
....


'Code for this test :
'(I didn't let it run all the way to the 8,838,608 cells that
'could have been added on just one worksheet of course)

Sub fghijx()
Dim aRange(1 To 65536, 1 To 256) As Range, i As Long, j As Long
Dim AllRange As Range

On Error GoTo Err_
Set AllRange = Cells(2, 1)

For j = 1 To 256
For i = 1 To 65536
If (j Mod 2) < (i Mod 2) Then
Set aRange(i, j) = Cells(i, j)
Set AllRange = Union(AllRange, aRange(i, j))
' some code to measure progress
End If
Next i
Next j

Exit_Sub:
Exit Sub

Err_:
MsgBox "col " & j & " row " & i & " Err # " & Chr(13) & _
Err.Number & " " & Err.Description
Resume Exit_Sub
End Sub