Re: Retrieving a long array from an IDispatch pointer

=?Utf-8?B?RGF2ZSBNb3Jhbg==?= <dmoran@nospam.nospam>
Tue, 25 Jul 2006 04:41:01 -0700
Hi Alexander

I'm not so sure that it's a VB collection anymore. I just tried the
following code and the QI fails. Am I doing something stupid?


IDispatch * pDispatch = PickQuickDlg->GetSelectedList();

if (pDispatch)
    COleVariant vntCollection;
    vntCollection.pdispVal = pDispatch;
    vntCollection.vt = VT_DISPATCH;


    // From IUnknown interface, we can query to get the EnumVARIANT interface
    IEnumVARIANT *pEnum;
    HRESULT hr =
    if (FAILED(hr)) {
        fprintf(stderr, "Got an error getting the enumeration variant: %x",

"Alexander Nickolov" wrote:

Alternatively, since this is a collection after all, you can Invoke
using DISPID_NEWENUM, QI the returned IUnknown pointer
for IEnumVARIANT and use that for enumeration.

Alexander Nickolov
Microsoft MVP [VC], MCSD

"Dave Moran" <dmoran@nospam.nospam> wrote in message

Hi Igor

You're right, it's more like a VB collection. I'll stick to invoking the
count and item properties/methods, as you suggest.

Thanks for you help


"Igor Tandetnik" wrote:

Dave Moran <dmoran@nospam.nospam> wrote:

Thanks for the reply. The documentation says:

The SelectedList property is a return collection that contains Long
values. These values are the list of map objects selected with the
PickQuick dialog.

The VB example provided has these lines of code:

       For i = 1 To pickQuick.SelectedList.Count
           str = str & " " & pickQuick.SelectedList.Item(i)
       Next i

I'm therefore presuming that it's a VB array.

On what basis? The syntax looks noting like accessing a VB array.

What you get is an automation object implementing Count and Item

How do I get to this safearray or do I have
to invoke the count and item properties/methods?

Yes, you have to invoke properties.
With best wishes,
    Igor Tandetnik

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necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
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