internal void Start()
{
if (!IsRunning)
{
_cancelEvent = NativeMethods.CreateEvent(IntPtr.Zero, false, false, Guid.NewGuid().ToString());
Task.Run(() =>
{
Console.WriteLine($"Registry Key Watcher task is started");
IsRunning = true;
IntPtr regEvent = NativeMethods.CreateEvent(IntPtr.Zero, false, false, Guid.NewGuid().ToString());
IntPtr reg = IntPtr.Zero;
IntPtr[] waitEvents = new IntPtr[] { regEvent, _cancelEvent };
UIntPtr hive = UIntPtr.Zero;
if (Hive == RegistryHive.LocalMachine)
{
hive = NativeMethods.Registry.HKEY_LOCAL_MACHINE;
}
else if (Hive == RegistryHive.CurrentUser)
{
hive = NativeMethods.Registry.HKEY_CURRENT_USER;
}
else if (Hive == RegistryHive.Users)
{
hive = NativeMethods.Registry.HKEY_USERS;
}
if (hive == UIntPtr.Zero)
{
Console.WriteLine($"Failed to get hive pointer: Hive={Hive.ToString()}");
return;
}
if (0 != NativeMethods.Registry.RegOpenKeyEx(
hive,
KeyPath,
0,
(int)NativeMethods.Registry.RegistryRights.ReadKey | (View == RegistryView.Registry64 ? (int)NativeMethods.Registry.RegWow64Options.KEY_WOW64_64KEY : (int)NativeMethods.Registry.RegWow64Options.KEY_WOW64_32KEY),
out reg))
{
Console.WriteLine($"Failed to open registry: Hive={Hive.ToString()}, KeyPath={KeyPath}");
return;
}
while (true)
{
if (0 != NativeMethods.Registry.RegNotifyChangeKeyValue(reg, false, NativeMethods.Registry.REG_NOTIFY_CHANGE.LAST_SET, regEvent, true))
{
Console.WriteLine($"Failed to register RegNotify: Hive={Hive.ToString()}, KeyPath={KeyPath}");
break;
}
if (NativeMethods.WAIT_OBJECT_0 != NativeMethods.WaitForMultipleObjects((uint)waitEvents.Length, waitEvents, false, NativeMethods.INFINITE))
{
Console.WriteLine($"Registry Monitor Exit.");
break;
}
RegistryKeyChanged?.Invoke(this, new RegistryKeyChangedEventArgs(Hive.ToString(), KeyPath));
}
if (reg != IntPtr.Zero)
{
NativeMethods.CloseHandle(reg);
reg = IntPtr.Zero;
}
if (regEvent != IntPtr.Zero)
{
NativeMethods.CloseHandle(regEvent);
regEvent = IntPtr.Zero;
}
if (_cancelEvent != IntPtr.Zero)
{
NativeMethods.CloseHandle(_cancelEvent);
_cancelEvent = IntPtr.Zero;
}
Console.WriteLine($"Registry Key Watcher task is finished");
});
}
}
private void RegistryWatcher_EventArrived(object sender, EventArrivedEventArgs e)
{
RegistryKeyChanged?.Invoke(sender, new RegistryKeyChangedEventArgs(e.NewEvent));
}