Dlls

[jithen_dt]

I want to make use of dlls created in .Net in vb6 is it possible Every thing is MAYA

[Heath Stewart]

Yes, so long as they expose CCWs, or COM-Callable Wrappers (which is the best way, and VB6 is entirely built on OLE/COM anyway). See Nick's article, Creating a CCW for COM-enabled, non-.NET Applications[^], and read Exposing .NET Framework Components to COM[^] in the .NET Framework SDK. A few important things to note: explicitly define your class and interfaces GUIDs (using the GuidAttribute), and DO NOT use auto-generated class interfaces. Instead, attribute your class with ClassInterface(ClassInterfaceType.None) and explicitly declare your class interface and implement it as the first interface in the list of interfaces. Make sure you declare your interface as an automation interface by attributing your interface with InterfaceType(ComInterfaceType.InterfaceIsIDispatch) (or ComInterfaceType.InterfaceIsDual). Since VB6 depends on automation, declaring your interface as an IUnknown implementation won't work.

Microsoft MVP, Visual C# My Articles

[scadaguy]

Yes. You'll need to use regasm.exe to register your assembly as a COM dll. Depending on what the public interface looks like you might have to decorate your code with attributes. There is a lot of information and examples on the web. You can also take advantage of COM+ services in the System.EnterpriseServices namespace.