On Window Switch taky používá patchovaný xpra:
http://winswitch.org/documentation/faq.html
...
# Why do you need to patch xpra?
# Some of the patches allow us to detect the state of the connections, others provide authentication over TCP, etc
The correct patched version is included in our repository and installer, it is also available here
...
# Microsoft Windows: which installer do I need to run?
# This one. You do not need to install Xpra, NX or VNC, they are bundled in.
Je to jedna z metod použití. Ono Window Switch je jenom jakési zastřešení a uhlazení existujících řešení.