private void SetUpInputHooks()
{
IKeyboardInputSink sink;
new UIPermission(PermissionState.Unrestricted).Assert(); //BlessedAssert
try
{
_inputPostFilter = new HwndWrapperHook(BrowserInteropHelper.PostFilterInput);
HwndSource hwndSource = base.HwndSourceWindow;
hwndSource.HwndWrapper.AddHookLast(_inputPostFilter);
sink = (IKeyboardInputSink)hwndSource;
}
finally
{
UIPermission.RevertAll();
}
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert(); //BlessedAssert
try
{
Debug.Assert(sink.KeyboardInputSite == null);
sink.KeyboardInputSite = new KeyInputSite(new SecurityCriticalData <IKeyboardInputSink>(sink));
}
finally
{
SecurityPermission.RevertAll();
}
}
