I want a notification when a specific RegistryKey in HKEY_CURRENT_USER
is changed.
So far I tried this via WMI
with no success:
var query = new WqlEventQuery(string.Format(
"SELECT * FROM RegistryKeyChangeEvent WHERE Hive='{0}' AND KeyPath='{1}' AND ValueName='{2}'",
hive, keyPath.Replace("",""), valueName));
_watcher = new ManagementEventWatcher(query);
_watcher.Scope.Path.NamespacePath = @"rootdefault";
_watcher.EventArrived += (sender, args) => KeyValueChanged();
_watcher.Start();
(Error was "Not found")
My second approach was using the WBEM Scripting COM component
with the intent to port the example from http://msdn.microsoft.com/en-us/library/aa393042(VS.85).aspx to c# but I didn't find any usage samples for the WBEM COM in c#
I found this http://www.codeproject.com/KB/system/registrymonitor.aspx class, but it didn't fit my needs as this class only monitors the whole key and I only want a notification when a specific value (specified via the ValueName
in the samples above) gets changed.
EDIT:
If you change the Hive to HKEY_CURRENT_USER
in the msdn vbscript example, it stops working. I couldn't find anything about this behaviour but a link from 2003
EDIT2:
Changes to the HKEY_CLASSES_ROOT
and HKEY_CURRENT_USER
hives are not supported by RegistryEvent
or classes derived from it, such as RegistryValueChangeEvent
. (MSDN)
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