i am writing a macro that looks at 306 cells in column A
each cell contains 1 or 0 (representing off and on)

I am trying to make the value increase each time i give a command -
remaining in the binary format)
I know this would be 2^306 combinations, but i promise this is not what i'm
attempting.

The code i have so far (is wrong), shows how i was trying to keep the 306
figures together as a string so i did not have any overflow errors. I
couldn't think of a way to move it up to the next level so was going to try
to multiply the string by 1 and add 1 then work through each character to try
to get 1 to 10 to 11 etc.
I admit the idea is hairbrained, but i'm stumped as to how i can get this to
work so was clutching at straws.

Any advice appreciated.

Sub test()
Dim x As String
Dim i As Range
Dim a As String

For Each i In Range("A1:A306")
p = i.Address
x = x & i.Value
Next i

1
For b = 1 To Len(x)
a = Right(Left(x, b), 1)
If a = 0 Or a = 1 Then
xbinary = True
Else
x = x + 1
GoTo 1
End If
Next b

z = x
'put data back in
For b = 1 To Len(x)
c = Right(Left(z, b), 1)
Range("A" & b).Value = c
Next b

End Sub