MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Interop;

using Impression.ViewModels;
using Impression.Commands;

namespace Impression
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window {
        public MainWindow() {
			InitializeComponent();
            DataContext = new MainViewModel();
			this.MaxHeight = SystemParameters.MaximizedPrimaryScreenHeight;

			((MainViewModel)DataContext).UpdateViewCommand.Execute("EmotionEntry");
		}

		[DllImport("user32.dll")]
		public static extern IntPtr SendMessage(IntPtr window, int message, int w_param, int l_param);

		private void topbar_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) {
			WindowInteropHelper helper = new WindowInteropHelper(this);
			SendMessage(helper.Handle, 161, 2, 0);
		}

		private void topbar_MouseEnter(object sender, MouseEventArgs e) {
			this.MaxHeight = SystemParameters.MaximizedPrimaryScreenHeight;
		}

		private void btn_minimize_Click(object sender, RoutedEventArgs e) {
			WindowState = WindowState.Minimized;
		}

		private void btn_close_Click(object sender, RoutedEventArgs e) {
			Application.Current.Shutdown();
		}
	}
}