Script to detect all 'detect only' updates or known wsus server updates

Doas anyone know how I can scan the target system to get all 'Detect
only' updates or all known updates with a vbscript.

Neither just specifying 'IsInstalled=1' in my searchquery or just
specifying 'IsPresent=1' returns only the assigned updates but not
other updates which are not installed by wua.
When i get the status of the target system in my WSUSAdmin, i see also
the updates which are not installed by wua. So the wua client does
detect these but is it possible to get the list from a vbscript with a
searchquery?


Thanks
Dimitri Meeuws