cleanup code, added version to commandline interface, updated MSTest nuget packages.

Katteker.Gui/UpdateWindow.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Drawing;
 using System.IO;
-using System.Runtime.InteropServices;
 using System.Windows.Forms;
 using Katteker.Gui.Properties;
 
@@ -24,7 +23,7 @@ namespace Katteker.Gui
             Font = SystemFonts.MessageBoxFont;
             Application.EnableVisualStyles();
             if (Environment.OSVersion.Version.Major >= 6)
-                SetProcessDPIAware();
+                NativeMethods.SetProcessDPIAware();
             InitializeComponent();
         }
 
@@ -46,14 +45,6 @@ namespace Katteker.Gui
             base.Dispose(disposing);
         }
 
-        [DllImport("User32.dll")]
-        private static extern bool ReleaseCapture();
-
-        [DllImport("User32.dll")]
-        private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
-
-        [DllImport("user32.dll")]
-        private static extern bool SetProcessDPIAware();
         private void CloseBtn_Click(object sender, EventArgs e)
         {
             Close();
@@ -77,8 +68,8 @@ namespace Katteker.Gui
                 return;
             }
             if (e.Button != MouseButtons.Left) return;
-            ReleaseCapture();
-            SendMessage(Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);
+            NativeMethods.ReleaseCapture();
+            NativeMethods.SendMessage(Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);
         }