Using VARIANT in COM

Hi,

I'm attempting to use a 3rd-party COM object from within Lisp.
I can get/put properties and (so far) invoke methods with fixed type
arguments.

I'm stuck at invoking a method with an "[in, optional] VARIANT" argument. 
When I supply a string to the method, just to fuzz it, I get:

  Error: "a-string" cannot be converted to 
  foreign-type (:STRUCT :TAG-VARIANT)

So I think I need to FLI:ALLOCATE-FOREIGN-OBJECT something, and use it as
the parameter, but I don't know what this something is. 

Hints appreciated. Cheers.

-- 
Ng Pheng Siong <ngps@netmemetic.com> 


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Re: Using VARIANT in COM

On Wed, Jul 16, 2003 at 12:30:34PM +0800, Ng Pheng Siong wrote: > I'm attempting to use a 3rd-party COM object from within Lisp. > [...] > I'm stuck at invoking a method with an "[in, optional] VARIANT" argument. Following up to myself... I was using CALL-COM-INTERFACE. Turns out if I use CALL-DISPATCH-METHOD, I get automatic parameter marshalling and things Just Work. So everything is happening fine now, including callbacks from COM to my interface implementations written in Lisp. I'm a happy bunny. ;-) -- Ng Pheng Siong <ngps@netmemetic.com> ________________________________________________________________________ This email has been scanned for all viruses by the MessageLabs Email Security System. For more information on a proactive email security service working around the clock, around the globe, visit http://www.messagelabs.com ________________________________________________________________________