Update

WAShell/WebAppForm.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Windows.Forms;
+using DataUtils;
+namespace WAShell
+{
+	[ComVisible (true)]
+	[ClassInterface (ClassInterfaceType.AutoDual)]
+	public partial class WebAppForm: Form, IScriptBridge, IWebBrowserPageScale
+	{
+		SplashForm splash;
+		ITaskbarList3 taskbar = null;
+		public WebAppForm ()
+		{
+			InitializeComponent ();
+		}
+		public int PageScale
+		{
+			get
+			{
+				var web2 = WebBrowserHelper.GetWebBrowser2 (webui);
+				if (web2 == null) return 0;
+				object inArg = null;
+				object outArg = null;
+				try
+				{
+					web2.ExecWB (
+						OLECMDID.OLECMDID_OPTICAL_ZOOM,
+						OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT,
+						ref inArg,
+						ref outArg
+					);
+					if (outArg is int) return (int)outArg;
+				}
+				catch { }
+				return 0;
+			}
+			set
+			{
+				var web2 = WebBrowserHelper.GetWebBrowser2 (webui);
+				if (web2 == null) return;
+				object inArg = value;
+				object outArg = null;
+				try
+				{
+					web2.ExecWB (
+						OLECMDID.OLECMDID_OPTICAL_ZOOM,
+						OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER,
+						ref inArg,
+						ref outArg
+					);
+				}
+				catch { }
+			}
+		}
+		public object CallEvent (string funcName, object e)
+		{
+			return null;
+		}
+	}
+}