Control How COM Marshals Your Data

Listing 1: sobj.idl — Sample Interface Definition Language file

typedef struct {
short size;
[size_is(size)] unsigned char *pData;
} wireCOMPARR;

typedef [unique] wireCOMPARR * LPCOMPARR;
typedef [wire_marshal(LPCOMPARR)] void * LPMYARRAY;
[
   object,
   uuid(005763A0-2850-11d1-ADCD-006097731D51)
]
interface ISimpleObject : IUnknown
{
   import "unknwn.idl";
   import "oaidl.idl";

   HRESULT DisplayArray([in]LPMYARRAY lpArr);
}