Zooming in Winforms Webbrowser Control in .NET


The zooming functionality in winforms webbrowser control in .net can be enabled by a simple registry change.

Please find the code snippet below. Make sure you add the registry change, before the webbrowser control is loaded.


using Microsoft.Win32;
using System.Diagnostics;

namespace zoombrowser
{
    public partial class Form2 : Form
    {


        public Form2()
        {
            string fileName = Process.GetCurrentProcess().ProcessName + ".exe";
            SetBrowserFeatureControlKey("FEATURE_WEBOC_DOCUMENT_ZOOM", fileName, 1);
            InitializeComponent();
        }


        private static void SetBrowserFeatureControlKey(string feature, string appName, uint value)
        {
            if (Environment.Is64BitOperatingSystem)
            {

                using (var key = Registry.LocalMachine.CreateSubKey(
                    String.Concat(@"Software\Wow6432Node\Microsoft\Internet Explorer\Main\FeatureControl\", feature),
                    RegistryKeyPermissionCheck.ReadWriteSubTree))
                {
                    key.SetValue(appName, (UInt32)value, RegistryValueKind.DWord);
                }

            }


            using (var key = Registry.CurrentUser.CreateSubKey(
                String.Concat(@"Software\Microsoft\Internet Explorer\Main\FeatureControl\", feature),
                RegistryKeyPermissionCheck.ReadWriteSubTree))
            {
                key.SetValue(appName, (UInt32)value, RegistryValueKind.DWord);
            }
        }

       
    }
}


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