See https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/nf-wdm-rtlqueryregistryvalues
The RTL_REGISTRY_OPTIONAL applies to the first parameter of the
RtlQueryRegistryValues() function, not to the Flags member of the
table entries. However, a RTL_QUERY_REGISTRY_REQUIRED flag exists
to mark values whose existence is NOT optional.
Problematic usage was introduced in the following modules:
drivers/input/i8042prt: Commit e7e959fb0 (r30000)
drivers/input/kbdclass: Commit 5a77f871d (r18911)
drivers/input/mouclass: Commit aeeab7d1f (r18906)
drivers/input/sermouse: Commit 3f348259c (r19100)
rosapps/drivers/green : Commit c8a90f769 (r21165)
There is no need to compile our DLLs as shared libraries since we are
managing symbols exports and imports through spec files.
On my system, this reduces the configure-time by a factor of two.
floppy drives in ReactOS and mount images on them.
Only the cmd got imported. The GUI interface may come later on.
Note that, as for vcdrom, the driver is left disabled and you need to explicitely
start it through vfd command line interface.
CORE-14090
It was provided by MS as a separate package to download for Windows (up to 7).
That class driver allows creating virtual drives on which we can later mount ISOs images.
It's rather basic, but does the job.
To use it, you can use the GUI app from Microsoft (Virtual CD-ROM Control Panel)
or the vcdcli in CLI. We're compatible :-).
Note that it's not loaded at boot, you need to manually start it, to lower memory footprint.
Both applications will handle this for you.
