private void MonitorThread()
{
try
{
IntPtr ptr = IntPtr.Zero;
lock (this)
{
if (RegistryPath.StartsWith("HKEY_CLASSES_ROOT"))
{
_monitorKey = Registry.ClassesRoot.OpenSubKey(RegistryPath.Substring(18));
}
else if (RegistryPath.StartsWith("HKCR"))
{
_monitorKey = Registry.ClassesRoot.OpenSubKey(RegistryPath.Substring(5));
}
else if (RegistryPath.StartsWith("HKEY_CURRENT_USER"))
{
_monitorKey = Registry.CurrentUser.OpenSubKey(RegistryPath.Substring(18));
}
else if (RegistryPath.StartsWith("HKCU"))
{
_monitorKey = Registry.CurrentUser.OpenSubKey(RegistryPath.Substring(5));
}
else if (RegistryPath.StartsWith("HKEY_LOCAL_MACHINE"))
{
_monitorKey = Registry.LocalMachine.OpenSubKey(RegistryPath.Substring(19));
}
else if (RegistryPath.StartsWith("HKLM"))
{
_monitorKey = Registry.LocalMachine.OpenSubKey(RegistryPath.Substring(5));
}
else if (RegistryPath.StartsWith("HKEY_USERS"))
{
_monitorKey = Registry.Users.OpenSubKey(RegistryPath.Substring(11));
}
else if (RegistryPath.StartsWith("HKU"))
{
_monitorKey = Registry.Users.OpenSubKey(RegistryPath.Substring(4));
}
else if (RegistryPath.StartsWith("HKEY_CURRENT_CONFIG"))
{
_monitorKey = Registry.CurrentConfig.OpenSubKey(RegistryPath.Substring(20));
}
else if (RegistryPath.StartsWith("HKCC"))
{
_monitorKey = Registry.CurrentConfig.OpenSubKey(RegistryPath.Substring(5));
}
// Fetch the native handle
if (_monitorKey != null)
{
object hkey = typeof(RegistryKey).InvokeMember(
"hkey",
BindingFlags.GetField | BindingFlags.Instance | BindingFlags.NonPublic,
null,
_monitorKey,
null
);
ptr = (IntPtr)typeof(SafeHandle).InvokeMember(
"handle",
BindingFlags.GetField | BindingFlags.Instance | BindingFlags.NonPublic,
null,
hkey,
null);
}
}
if (ptr != IntPtr.Zero)
{
while (true)
{
// If this._monitorThread is null that probably means Dispose is being called. Don't monitor anymore.
if ((_monitorThread == null) || (_monitorKey == null))
{
break;
}
// RegNotifyChangeKeyValue blocks until a change occurs.
int result = AdvApi32.RegNotifyChangeKeyValue(ptr, true, _filter, IntPtr.Zero, false);
if ((_monitorThread == null) || (_monitorKey == null))
{
break;
}
if (result == 0)
{
if (Changed != null)
{
RegistryChangeEventArgs e = new RegistryChangeEventArgs(this);
Changed(this, e);
if (e.Stop)
{
break;
}
}
}
else
{
if (Error != null)
{
Win32Exception ex = new Win32Exception();
// Unless the exception is thrown, nobody is nice enough to set a good stacktrace for us. Set it ourselves.
typeof(Exception).InvokeMember(
"_stackTrace",
BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField,
null,
ex,
new object[] { new StackTrace(true) }
);
RegistryChangeEventArgs e = new RegistryChangeEventArgs(this)
{
Exception = ex
};
Error(this, e);
}
break;
}
}
}
}
catch (Exception ex)
{
if (Error != null)
{
RegistryChangeEventArgs e = new RegistryChangeEventArgs(this)
{
Exception = ex
};
Error(this, e);
}
}
finally
{
Stop();
}
}