I get the error "OLE error code 0x800004002 : no such interface supported."
when I try to use AddObject.

thisform.AddObject("oPinPad","OLEControl","rpreader.rppinpad")

The odd thing is that I can use CreateObject on the same object and it works. The problem is that I really want to use AddObject to be consistent in my code.

oPinPad = createobject("rpreader.rppinpad")

Is there a difference between AddObject and CreateObject that would cause this?
Are they using different interfaces for OLE objects?
Is there anything that I can do to help the object creator understand why I get this error in VFP?