...
// load screen
		Noesis::Ptr<BaseScreen> screen = Noesis::DynamicPtrCast<BaseScreen>(Noesis::GUI::LoadXaml(screenName.c_str()));
		Noesis::Ptr<Noesis::IView> view = Noesis::GUI::CreateView(screen);
		mActiveView = view;
		mActiveView->AddReference();
		mActiveView->GetRenderer()->Init(Noesis_GetRenderDevice());

// application loop:
		if (mActiveView)
		{
			// loop through any keys that changed --
			mActiveView->KeyDown(key);
			
			uint32_t w = SYSTEM<WindowSystem>()->GetWindow()->GetWidth();
			uint32_t h = SYSTEM<WindowSystem>()->GetWindow()->GetHeight();
			mActiveView->SetSize(w, h);

			double globalTime = Timing::GetMillisecondsSince(startTime);
			mActiveView->Update(globalTime / 1000);
		}

                        <TextBox x:Name="UserBox" Grid.Row="4" VerticalAlignment="Bottom" Margin="5,0,10,0" Text="{Binding AccountName, Mode=OneWayToSource}" noesis:Text.Placeholder="Type your username">
                            <b:Interaction.Triggers>
                                <b:EventTrigger EventName="MouseEnter">
                                    <noesis:SetFocusAction/>
                                </b:EventTrigger>
                                <b:EventTrigger EventName="GotKeyboardFocus">
                                    <noesis:SelectAllAction/>
                                </b:EventTrigger>
                                <b:KeyTrigger Key="Return" ActiveOnFocus="True">
                                    <b:ChangePropertyAction TargetName="Message" PropertyName="Text" Value=""/>
                                    <b:InvokeCommandAction Command="{Binding LoginCommand}" CommandParameter="{Binding ElementName=PassBox}"/>
                                </b:KeyTrigger>
                            </b:Interaction.Triggers>
                        </TextBox>

/// Notifies that a key was translated to the corresponding unicode character.
/// If a key is repeatedly pressed, its corresponding 'Char' event is sent again.
/// 'Char' messages are expected to be sent between the corresponding 'Down' and 'Up' events:
///  - KeyDown
///  - Char
///  - KeyUp
/// Returns true if event was handled
virtual bool Char(uint32_t ch) = 0;