Early bindings for COM automation objects

Hello, I would like to know if there is a procedure to connect an ActiveX COM server using early bindings in MATLAB. I've tried by using the IUnknown interface, but when I explore the properties and methods using the commands 'get'/'invoke' the results are empty. I've also tried to access the properties and methods that I know using the commands 'get', 'set' and 'invoke', but unsuccessfully. Thanks