[PATCH v2] server: Release related atoms when destroying a window class

[Ralf Habacker]

Am 26.11.18 um 17:55 schrieb Dmitry Timoshkov:
> Ralf Habacker <ralf.habacker at freenet.de> wrote:
> 
>> +    ok(GetClipboardFormatNameW(classatom, str, ARRAY_SIZE(str)) == 0,
>> +        "UnregisterClass() failed - unable to unregister atom\n");
> 
> Using a clipboard api in the class test looks strange, why not call
> GlobalGetAtomName() directly instead?
> 
On native Windows Atoms registered by RegisterClass are not in the
global atom table and therefore could not be checked by inspecting the
global atom table.

from
https://docs.microsoft.com/en-us/windows/desktop/dataxchg/about-atom-tables
"Also, registered classes are stored in an internal atom table used by
the system. An application adds atoms to this atom table using the
RegisterClass or RegisterClassEx function."