COM module function returning HRESULT (eg. VBA function CDec) requires special handling in COM collector

[ThunderFrame]

CDec is defined as:

[helpcontext(0x0010645a)] 
HRESULT _stdcall CDec(
	[in] VARIANT* Expression,
	[out, retval] VARIANT* pvar
);

Rubberduck currently reads the declaration as having 2 parameters, Expression and pvar, but VBA only exposes Function CDec(Expression).

That is, CDec returns an HRESULT and has an out parameter, so it looks like a property definition on a COM interface, but the Conversion module isn't an interface.

Rubberduck needs to special case the CDec function, and probably any other function in a COM module that returns an HRESULT (I haven't looked outside the VBA library so far).