Use the user control of C # To create ActiveX

Article: Create an ActiveX using a CSHARP usercontrol
Source: http://www.codeguru.com/csharp/.net/net_general/comcom/article.php/c16257
Author: Andreas verhamme
Translation: dezai

Http://www.dezai.cn/blog/article.asp? Id = 269

This article mainly introduces how to use the user control of DOTNET in C # To create ActiveX controls. You can design related properties, methods, and events of ActiveX.

Development Environment: Visual studio2005

1. Create a user control using Visual Studio

2. Set the assebmly attributes of the Assembly.

3. Interface Design for modifying user controls

Note: Be sure to add the following event class.

Program code 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 registration/logout function to the source code.

Program 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

Program code/ActiveX properties (get/set) //////////////////////////////////////// //////////////////////////
Private int ptextval;
Public int textval
{
Get
{
Ptextval = (INT) (numericupdown1.value );
Return ptextval;
}
Set
{
Ptextval = value;
Numericupdown1.value = ptextval;
}
}

6. Add an ActiveX method.

Program code/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

Program code // 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 this ActiveX on a PC

Use the regasm.exe csharpwindowsactivex. dll command to register this new ActiveX control on your computer.

9. Test Your ActiveX

Use tstcon32.exe tool to test ActiveX in visul Studio