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

  • Instead of only managing projects organizations do need to manage value! "Doing the right things" and "doing things right" are the essential ingredients for successful software and systems delivery. Unfortunately, with distributed delivery spanning multiple disciplines, geographies and time zones, many organizations struggle with teams working in silos, broken lines of communication, lack of collaboration, inadequate traceability, and poor project visibility. This often results in organizations "doing the …

  • Hurricane Sandy was one of the most destructive natural disasters that the United States has ever experienced. Read this success story to learn how Datto protected its partners and their customers with proactive business continuity planning, heroic employee efforts, and the right mix of technology and support. With storm surges over 12 feet, winds that exceeded 90 mph, and a diameter spanning more than 900 miles, Sandy resulted in power outages to approximately 7.5 million people, and caused an estimated $50 …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds