ActiveX component can't create object VBA runtime error

Question

STEP 1: creating Excel 2010 add-in

I created a new project, Excel 2010 add-in, .Net 4 framework

I added a class file to it "Name.cs", interface "iName.cs" and added a function to it

[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
public interface iName
{
string getName();
}
[ClassInterface(ClassInterfaceType.None)]
public class Name 
{
public string getName()
{
 return "Hello";
} 
}

STEP 2: Configuring build events

I configured the build events of the pro

"%Windir%\Microsoft.NET\Framework\v4.0.30319\regasm" /codebase /tlb 
"$(MSBuildProjectDirectory)\$(OutputPath)$(AssemblyName).dll"

This will register the Dll so that it will be available in the references column in the Excel

STEP 3: Adding reference in Excel macro

I created a module, in the tools-> reference I added the NameProvider (name of that assembly/project) add-in that is available after I built the Excel add-in project

I tried to create an object for that added reference

Public Sub test()
Dim nameObj as NameProvider.Name
Dim name as string
Set nameObj = new NameProvider.Name  'error 429 occurs here
name = nameObj.getName()  'getName function automatically comes after .
End Sub

Answer 1

For Office 64bit you need to compile your assembly as x64 compatible, and register it with the 64bit framework by using the regasm from the Framework 64 folder.

"%Windir%\Microsoft.NET\Framework64\v4.0.30319\regasm" /codebase /tlb 
"$(MSBuildProjectDirectory)\$(OutputPath)$(AssemblyName).dll"

%Windir%\\Microsoft.NET\\Framework\\v4.0.30319\\regasm -> %Windir%\\Microsoft.NET\\Framework 64 \\v4.0.30319\\regasm