Hi all

I am developing a component on NT 4.0 with SP 4.0 in VB 6.0 SP 4.0 added the
feature of passing structures to COM. I am using this feature. All was
working fine with small structures. I have one giant structure which is 112
bytes long. I have compiled the VB code into a DLL If I use the com object
in this DLL in VB 6.0 client every thing works fine (even the huge
structure). When I try to do the same thing under VC 6.0 I get junk
structure. The first few fields of the structure are ok but the rest is
junk.

What gives???

Sure would appreciate some light on this.

Prady

You have to be careful about the idl emitted.   You need to be very explicit
about the structure, is it a ptr to a structure, a pointer to an array of
structure instances, a pointer to an array of pointers to structures.  All
of these can be catered for.  VB sorts all the references out for you.  In
C++ land you have to ensure that your code accesses the structures
correctly.  Don Box did an excellant article on this, see:
ActiveX/COM Q&A article in theNov 96 MSJ

Also, see:
Understanding Interface Definition Language which is available on:
www.microsoft.com/msj/0898/idl/idl.htm