Try this:
Set IeObject = CreateObject("InternetExplorer.Application")
IeObject.Visible = True
IeObject.Navigate "www.traderji.com"
If it works for you, you have successfully made a COM call.
For Plus, the object name is Nest.PlusApi instead of InternetExplorer.Application. Supported functions would be SetObjectName and PlaceOrder instead of Navigate. The parameters to the functions, and their meaning, are described in this thread. Take it from there.