Automation Error Interop Vb6
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn vb6 automation error accessing the ole registry more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users vb6 automation error the object invoked has disconnected from its clients Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping vb6 automation error classfactory cannot supply requested class each other. Join them; it only takes a minute: Sign up Automation Error when instantiating a .Net COM visible class up vote 5 down vote favorite 1 I created a COM-interop .dll with this simple class: using System.Runtime.InteropServices;
Vb6 Automation Error The System Cannot Find The File Specified
namespace ClassLibrary1 { [ComVisible(true)] [Guid("795ECFD8-20BB-4C34-A7BE-DF268AAD3955")] public interface IComWeightedScore { int Score { get; set; } int Weight { get; set; } } [ClassInterface(ClassInterfaceType.None)] [Guid("9E62446D-207D-4653-B60B-E624EFA85ED5")] public class ComWeightedScore : IComWeightedScore { private int _score; public int Score { get { return _score; } set { _score = value; } } private int _weight; public int Weight { get { return _weight; } set { _weight = value; } } public ComWeightedScore() { _score = 0; _weight = automation error in vb6 on windows 7 1; } } } I registered it using: C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\regasm C:\ComClasses\Classlibrary1.dll /tlb: Classlibrary1.tlb Finally I succesfully added a reference to the .dll after which VB6 gave me intellisense on the object. Private Sub Form_Load() Dim score1 As ComWeightedScore Set score1 = New ComWeightedScore score1.Score = 500 End Sub On the line Set score1=new ComWeightedScore the exception Automation Error is raised. It can hardly be any simpler than this... Where is the error?! .net vb6 com-interop share|improve this question edited Aug 29 '11 at 4:07 asked Aug 28 '11 at 22:01 Dabblernl 7,2181365124 And why do you say the error is in assigning int or long? what fails is the constructor call. Does it still fail if you remove the assignments from the body of the constructor? Also, provide more info and details on the error you get. –Davide Piras Aug 28 '11 at 22:29 add a comment| 2 Answers 2 active oldest votes up vote 7 down vote accepted You forgot the /codebase option in the Regasm.exe command line. Without it, you'll have to strong-name the assembly and put it in the GAC with gacutil.exe. Good idea on the client machine, just not on yours. share|improve this answer answered Aug 29 '11 at 0:15 Hans Passant 652k809511598 add a comment| up vote 3 down vote If you are running on a 64bit processor with your project compi
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Visual Basic Automation Error
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Visual Basic Automation Error Unspecified Error
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million http://stackoverflow.com/questions/7224255/automation-error-when-instantiating-a-net-com-visible-class programmers, just like you, helping each other. Join them; it only takes a minute: Sign up VB6 Automation Error on Calls to .NET 3.5 Assemblies After the First Calls up vote 0 down vote favorite Some of the sources I've checked already: http://www.experts-exchange.com/Programming/Languages/.NET/Visual%5FBasic.NET/Q%5F23359339.html http://mygreenpaste.blogspot.com/2006/03/net-framework-20-configuration-tool.html http://support.microsoft.com/kb/186063 I'm busy developing .NET modules that will hook into our http://stackoverflow.com/questions/1487406/vb6-automation-error-on-calls-to-net-3-5-assemblies-after-the-first-calls existing VB6 code. I've created a test VB6 project from which to launch the new code which comprises of a form with a button, and on the button's click event is Dim launcher As New VB6InteropLaunchPad.launcher launcher.FormTypeEnum = FormTypeEnum_MySpecificForm launcher.launchAppropriateForm It is successful the first time I click the button. However, if I click the button again, I get the following error: Run-time error '-2146233079 (80131509)': Automation Error Subsequent calls to the .NET code fail with the same error message unless I close and restart the IDE. If I compile the VB6 project to an EXE the same thing happens. I have to close the EXE and run it again to be able to access the .NET code. I've tried the suggestion on http://support.microsoft.com/kb/186063 and did the following: Option Explicit ' http://support.microsoft.com/kb/186063 Const FORMAT_MESSAGE_FROM_SYSTEM = &H1000 Private Declare Function FormatMessage Lib "kernel32" Alias _ "FormatMessageA" (ByVal dwFlags As Long, lpSource As Long, _ ByVal dwMessageId As Long, ByVal dwLanguageId As Long, _ ByVal
12, 20095 0 0 0 This is a quite popular topic on the Internet, and this has a reason: a lot of developers need to integrate legacy components written in Visual Basic 6 https://blogs.msdn.microsoft.com/aszego/2009/10/12/visual-basic-6-and-net-com-interop/ with .NET.COM Interop is or should be one of the easiest ways to bring these two worlds together. The problem begins when multiple threads, apartments or custom data types float into the http://blogs.artinsoft.net/Mrojas/archive/2010/06/24/Interop-BinaryCompatibilty-for-VB6-Migrations.aspx picture. Today I’d like to share an easy way to tackle with data type interop, plus an unexplained discovery I made during a recent case. The problem My customer had a .NET automation error method defined as follows: public void SetData(Data[] param) { … } ‘Data’ was his custom type, also defined in .NET. When calling this method from Visual Basic 6 through COM interop, we get a run-time error: “Function or interface marked as restricted, or the function uses an Automation type not supported in Visual Basic”. It’s all vb6 automation error about the TLB When data is passed from client to server or back, chances are that it must be marshaled (i.e. converted). There’re a number of conditions that dictate this, e.g. different representation of data, the need to serialize and transmit data over network, etc. However, (automated) marshaling cannot happen without some metadata describing the actual data types that are involved. With the advent of .NET, metadata is stored right in the assembly with the code. But in terms of COM, it was stored in a Type Library (TLB). The TLB itself is just a binary representation of the Interface Definition Language (IDL). TLB/IDL is the “common language” that all COM components or clients speak. It’s worth noting that IDL is a powerful language that can express constructs which are not supported by every programming language or runtime. Also keep in mind that a TLB can be included within an EXE or a DLL as a resource. As for Visual Basic 6, it also relies on the TLB to make the types of the component usable in the client. When doing COM interop, the TLB is generated by the .NET SDK
COM, Interop, vb6migration, VB.NET, Vb6, .NET, Visual Basic to .NET// Comments (0) In VB6 when you have an ActiveX Library it was very important to use the BinaryCompatibility setting to make sure that your applications did not break after a change. So let’s first introduce what is binary compatibility and how to accomplish that in .NET. Binary Compatibility allows to make changes to your components or COM classes without recompiling every application you've made that uses the component. And why do you need it. Why compatibility breaks. On lets see. An ActiveX Control or DLL expose Public interfaces. Those interfaces have all of the properties, methods, events, etc. that you've marked as Public. In other words, everything you've added that shows in Intellisense while working outside of your component. Now let's say you have create a class, with two Methods Method1 and Method2 When you compile, VB generates all the COM infraestructure you need for your component. It defines a CoClass and an interface and an entry for each method. For a vb class with two methods: Sub Method1() End Sub Sub Method2() End Sub It will produce a typelib like: // Generated .IDL file (by the OLE/COM Object Viewer) // // typelib filename: