vb.net中怎么将类变量赋值给接口变量呢？

vb.net中如何将类变量赋值给接口变量呢？？？急！！！
在C#中可以直接赋值，可在vb.net中怎样直接赋值呢？

C#code
interface IFactory 
{}

IFactory operFactory =new AddFactory();
Operation oper=operFactory.CreateOperation()

谢谢啦啦！

[解决办法]
VB.NET 也一样啊


Dim operFactory As IFactory = New AddFactory();