diff --git a/source/VirtualDesktop/ApplicationHelper.cs b/source/VirtualDesktop/ApplicationHelper.cs
index 593a601..06d230e 100644
--- a/source/VirtualDesktop/ApplicationHelper.cs
+++ b/source/VirtualDesktop/ApplicationHelper.cs
@@ -9,16 +9,29 @@ public static class ApplicationHelper
 	{
 		internal static IApplicationView GetApplicationView(this IntPtr hWnd)
 		{
-			IApplicationView view;
-			ComObjects.ApplicationViewCollection.GetViewForHwnd(hWnd, out view);
-
-			return view;
+			try
+			{
+				IApplicationView view;
+				ComObjects.ApplicationViewCollection.GetViewForHwnd(hWnd, out view);
+				return view;
+			}
+			catch (System.Runtime.InteropServices.COMException ex) when (ex.Match(HResult.TYPE_E_ELEMENTNOTFOUND))
+			{
+				return null;
+			}
 		}
 
 		public static string GetAppId(IntPtr hWnd)
 		{
+			var view = hWnd.GetApplicationView();
+
+			if (view == null)
+			{
+				throw new ArgumentException(nameof(hWnd));
+			}
+
 			string appId;
-			hWnd.GetApplicationView().GetAppUserModelId(out appId);
+			view.GetAppUserModelId(out appId);
 
 			return appId;
 		}
diff --git a/source/VirtualDesktop/VirtualDesktop.static.pin.cs b/source/VirtualDesktop/VirtualDesktop.static.pin.cs
index 6a3aaa6..aac6eb1 100644
--- a/source/VirtualDesktop/VirtualDesktop.static.pin.cs
+++ b/source/VirtualDesktop/VirtualDesktop.static.pin.cs
@@ -11,7 +11,14 @@ public static bool IsPinnedWindow(IntPtr hWnd)
 		{
 			VirtualDesktopHelper.ThrowIfNotSupported();
 
-			return ComObjects.VirtualDesktopPinnedApps.IsViewPinned(hWnd.GetApplicationView());
+			var view = hWnd.GetApplicationView();
+
+			if (view == null)
+			{
+				throw new ArgumentException(nameof(hWnd));
+			}
+
+			return ComObjects.VirtualDesktopPinnedApps.IsViewPinned(view);
 		}
 
 		public static void PinWindow(IntPtr hWnd)
@@ -20,6 +27,11 @@ public static void PinWindow(IntPtr hWnd)
 
 			var view = hWnd.GetApplicationView();
 
+			if (view == null)
+			{
+				throw new ArgumentException(nameof(hWnd));
+			}
+
 			if (!ComObjects.VirtualDesktopPinnedApps.IsViewPinned(view))
 			{
 				ComObjects.VirtualDesktopPinnedApps.PinView(view);
@@ -32,10 +44,36 @@ public static void UnpinWindow(IntPtr hWnd)
 
 			var view = hWnd.GetApplicationView();
 
+			if (view == null)
+			{
+				throw new ArgumentException(nameof(hWnd));
+			}
+
+			if (ComObjects.VirtualDesktopPinnedApps.IsViewPinned(view))
+			{
+				ComObjects.VirtualDesktopPinnedApps.UnpinView(view);
+			}
+		}
+
+		public static void TogglePinWindow(IntPtr hWnd) 
+		{
+			VirtualDesktopHelper.ThrowIfNotSupported();
+
+			var view = hWnd.GetApplicationView();
+
+			if (view == null)
+			{
+				throw new ArgumentException(nameof(hWnd));
+			}
+
 			if (ComObjects.VirtualDesktopPinnedApps.IsViewPinned(view))
 			{
 				ComObjects.VirtualDesktopPinnedApps.UnpinView(view);
 			}
+			else
+			{
+				ComObjects.VirtualDesktopPinnedApps.PinView(view);
+			}
 		}
 
 		public static bool IsPinnedApplication(string appId)
@@ -64,5 +102,19 @@ public static void UnpinApplication(string appId)
 				ComObjects.VirtualDesktopPinnedApps.UnpinAppID(appId);
 			}
 		}
+
+		public static void TogglePinApplication(string appId) 
+		{
+			VirtualDesktopHelper.ThrowIfNotSupported();
+
+			if (ComObjects.VirtualDesktopPinnedApps.IsAppIdPinned(appId))
+			{
+				ComObjects.VirtualDesktopPinnedApps.UnpinAppID(appId);
+			}
+			else
+			{
+				ComObjects.VirtualDesktopPinnedApps.PinAppID(appId);
+			}
+		}
 	}
 }
diff --git a/source/VirtualDesktop/VirtualDesktopHelper.cs b/source/VirtualDesktop/VirtualDesktopHelper.cs
index 11408f3..046163b 100644
--- a/source/VirtualDesktop/VirtualDesktopHelper.cs
+++ b/source/VirtualDesktop/VirtualDesktopHelper.cs
@@ -36,9 +36,16 @@ public static void MoveToDesktop(IntPtr hWnd, VirtualDesktop virtualDesktop)
 			}
 			else
 			{
-				IApplicationView view;
-				ComObjects.ApplicationViewCollection.GetViewForHwnd(hWnd, out view);
-				ComObjects.VirtualDesktopManagerInternal.MoveViewToDesktop(view, virtualDesktop.ComObject);
+				try
+				{
+					IApplicationView view;
+					ComObjects.ApplicationViewCollection.GetViewForHwnd(hWnd, out view);
+					ComObjects.VirtualDesktopManagerInternal.MoveViewToDesktop(view, virtualDesktop.ComObject);
+				}
+				catch (System.Runtime.InteropServices.COMException ex) when (ex.Match(HResult.TYPE_E_ELEMENTNOTFOUND))
+				{
+					throw new ArgumentException(nameof(hWnd));
+				}
 			}
 		}
 	}