desktop heap usage in windows

Hi

In the latest release 8.4.3 is the desktop heap still a problem in Windows?
I found some articles on the web that said on Windows xp the desktop heap is
rather small.
Apparantly under xp it's limited to 45 connections.
They also said that the desktop heap is larger on windows servers and that
gives you about 125 connections on a windows server.
They said it's possible to edit the registry to make the desktop heap larger
but if you make it too large then your machine won't boot.
So how many connections can windows xp and vista handle if you make the
desktop heap as large as possible?
How many connections can a windows server handle if you make the desktop
heap as large as possible?

Thanks

H.F.