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Good day all!!!

I have been trying to create a windows form control to host in a webpage. Code below:

using System;
using System.Data;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
using System.ComponentModel;
using System.Collections.Generic;
using System.Runtime.InteropServices;
namespace WindowsFormsControlLibrary2
    public partial class UserControl1 : UserControl
        public UserControl1()
        public void SendMessage(string msg)
            _lblMessage.Text = msg;

HTML file looks like this. Code below:

<html xmlns="">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Windows Form Control Test Page</title> 
<script type="text/javascript">           
    function SendMessageToWinControl()
     var winCtrl = document.getElementById("MyWinControl"); 
     winCtrl.SendMessage("Message sent from the HTML page!!");               


  <h1>Windows Form Control:</h1> 
<object id="MyWinControl" classid="http://localhost/WindowsFormsControlLibrary2.dll#WindowsFormsControlLibrary2.UserControl1" height="100" width="300" VIEWASTEXT></object>
<input type="button"  önclick="SendMessageToWinControl()" value="Send Message" />


I'm putting both the html and dll files in my wwwroot folder. But I'm not seeing the control. If I click on the "SendMessageToWinControl" button, while firebug is open, it gives me the following error:

Object doesn't support property or method SendMessage;
test.html, line 13 character 6

Even when I copy the code from:
winform control hosting to webform[^]

It's not working. I'm using VS2010 C#4.0
Posted 1-Mar-13 1:41am
Edited 1-Mar-13 1:43am

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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