How can I create an ActiveX IDL to pass an array of references into Labview

[viScience]

It appears that LV is designed to be able to receive a COM variant that contains an array of references but I cannot understand what the appropriate IDL should be on the COM side of things. I am current trying to use a safearray to hold the references but the automation reference in LV returns a variant that is empty (VT_EMPTY). I have had success with COM interfaces that expose single references, scalers and arrays of scalers and I am able to get the data properly in LV.

[codeman]

Have you tried using a regular array rather than using a safearray? This might be causing you added complication.

[DarkLordOfG]

Did you ever resolve this?  I am trying the same thing.  here is my IDL

HRESULT GetJumboRollInformation( [in] long lRollsRequested,
          [out,size_is( lRollsRequested ),length_is( *plNumberOfRollsReturned )] IMIGRollInformation **pIMIGRollInformation,
          [out] long *plNumberOfRollsReturned );

Labview shows just a single interface pointer not an array.

[Jason_Whaylen]

Hi,

It looks like this is a duplicate post.  The other thread is here, and looks to contain a bit more information.  A response should be posted to this thread soon.

Thanks.

Jason W.

Message Edited by jason_w on 10-18-2007 04:46 PM