Ok .. I got it to work, but not with the number 1

Now having 4 browser windows open, these are what worked ..
$dde(iexplore,WWW_GetWindowInfo,3)
$dde(iexplore,WWW_GetWindowInfo,4)
$dde(iexplore,WWW_GetWindowInfo,19)
$dde(iexplore,WWW_GetWindowInfo,20)

What's up with that, I assumed 1 would return the first
window, 2 would return second window and so on,
is each window assigned an ID or something like CID
in mIRC? Weird.