Create an ActiveX using a Csharp Usercontrol

This article is about creating ActiveX controls using a DotNet Usercontrol in Csharp. You can design all ActiveX features like: properties, methods and events.

Environment:  Visual Studio(2005) Csharp

How to Do This

1. Create a Usercontrol using Visual Studio (C#):

2. Configure the project properties:

3. Modify the usercontrol interface:

Note: Make sur you added the EVENTS class:   [ClassInterface(ClassInterfaceType.AutoDual), ComSourceInterfaces(typeof(UserControlEvents))]
using System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Drawing;
using
System.Data;
using
System.Text;
using
System.Windows.Forms;
// Add references
using System.Runtime.InteropServices;
using
System.Reflection;
using Microsoft.Win32;

namespace CsharpWindowsActiveX
{

            [ProgId("CsharpWindowsActiveX.ActiveXUserControl")]
            [
ClassInterface(ClassInterfaceType.AutoDual), ComSourceInterfaces(typeof(UserControlEvents))]

            public partial class ActiveXUserControl : UserControl
           
{

                    public ActiveXUserControl()
                    {
                         InitializeComponent();
                    }

                     .....

 

4. Add the register/unregister section in the source code

// register COM ActiveX object

[ComRegisterFunction()]
public static void RegisterClass(string key)
{
               StringBuilder skey = new StringBuilder(key);
              skey.Replace(
@"HKEY_CLASSES_ROOT\", "");
             
RegistryKey regKey = Registry.ClassesRoot.OpenSubKey(skey.ToString(), true);
             
RegistryKey ctrl = regKey.CreateSubKey("Control");
             ctrl.Close();
             
RegistryKey inprocServer32 = regKey.OpenSubKey("InprocServer32", true);
              inprocServer32.SetValue(
"CodeBase", Assembly.GetExecutingAssembly().CodeBase);
              inprocServer32.Close();
              regKey.Close();
}


[ComUnregisterFunction()]
public static void UnregisterClass(string key)
{
              
StringBuilder skey = new StringBuilder(key);
               skey.Replace(
@"HKEY_CLASSES_ROOT\", "");
              
RegistryKey regKey = Registry.ClassesRoot.OpenSubKey(skey.ToString(), true);
               regKey.DeleteSubKey(
"Control", false);
              
RegistryKey inprocServer32 = regKey.OpenSubKey("InprocServer32", true);
               regKey.DeleteSubKey(
"CodeBase", false);
               regKey.Close();
}

 

 

5. Add an ActiveX property:

// ActiveX properties (Get/Set) //////////////////////////////////////////////////////////////////

private int ptextVal;
public int TextVal
{
      
get
       {
                  ptextVal = (
int)(numericUpDown1.Value);
                 
return ptextVal;
        }
       
se
t
       {

            ptextVal = value;
                numericUpDown1.Value = ptextVal;
         }
}

 

 

 

6. Add an ActiveX method:

// ActiveX methods/functions //////////////////////////////////////////////////////////////////

public interface ICOMCallable


{
            
int GetTextBoxValue();
}

public int GetTextBoxValue()
{
            
int i = (int)(numericUpDown1.Value);
            
MessageBox.Show("ActiveX method: GetTextBoxValue " + i.ToString());
            
return (i);
}

 

 

7. Add an ActiveX event:

// Eventhandler interface //////////////////////////////////////////////////////////////////
 

public delegate void ControlEventHandler(int NumVal);
[Guid("0A415E38-372F-45fb-813B-D9558C787EA0")]
[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
 

public interface UserControlEvents
{
               [DispId(0x60020001)]
               void OnButtonClick(int NumVal);
}
 

public event ControlEventHandler OnButtonClick;
 

private void buttonOK_Click(object sender, EventArgs e)
{

        int NumVal;
        if (OnButtonClick != null)
        {
                 NumVal = (int)(numericUpDown1.Value);
                 OnButtonClick(NumVal);
         }
}

 

 

 

8. Register the ActiveX on your PC:

Register the new ActiveX on your computer using the command:  RegAsm.exe CsharpWindowsActiveX.dll

9. Test your ActiveX:

Use the TSTCon32.exe tool from Visul Studio to test the ActiveX:

 



Downloads

Comments

  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Live Event Date: May 7, 2014 @ 1:00 p.m. ET / 10:00 a.m. PT This eSeminar will explore three popular games engines and how they empower developers to create exciting, graphically rich, and high-performance games for Android® on Intel® Architecture. Join us for a deep dive as experts describe the features, tools, and common challenges using Marmalade, App Game Kit, and Havok game engines, as well as a discussion of the pros and cons of each engine and how they fit into your development …

  • Download the Information Governance Survey Benchmark Report to gain insights that can help you further establish business value in your Records and Information Management (RIM) program and across your entire organization. Discover how your peers in the industry are dealing with this evolving information lifecycle management environment and uncover key insights such as: 87% of organizations surveyed have a RIM program in place 8% measure compliance 64% cannot get employees to "let go" of information for …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds