Types into and out of DLL's

I am using a single "Type" to transfer data into an Active X DLL. The DLL has a single function within it that outputs a result as a second, different "Type".

The input type is defined as a BYREF in the function call within the DLL but when I run the client program I get a BYREF error on my data entry Type.

Does anyone know what the problem might be ?? Is it a valid techinque to use a function within a DLL like this?

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Confused of Windsor
:confused:

The interface has to be declare the udt explicitly as ByRef

Code:

---

Implements IMyInterface
Private type MyUDT
  a as Long
  b as variant
End Type
Private Property Let stuff(ByRef myVar as MyUdt)
End Property

---

As I remember, UDT's, like Strings are reffed ByVal by default.