Attached is a copy of the full DebugView outpput log, with the videoport line being:
Zitat:
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videoprt found display class key (9/0) videoprt NO AllocConfig (C0000034)KTM: TmRollbackTransaction for tx
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This seems surprising, since my Registry does contain a subkey "AllocConfig" at the level it is trying to query.
And oddly, the KEY_GET_VALUE(hkRev, usCls) macro / ZwQueryKeyValue function above that seems to work just fine. Could it be a difference in how Windows 7 handles REG_RESOURCE_LIST entries and/or ZwOpenKey registry access permissions (KEY_ENUMERATE_SUB_KEYS|KEY_QUERY_VALUE)?
As I understand, the code as a whole works properly in Windows XP, but that might be something to double check since it may be possible the code may fix the situation on XP through other unexpected means.