Re: Retrieving a long array from an IDispatch pointer
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?
Dave
IDispatch * pDispatch = PickQuickDlg->GetSelectedList();
if (pDispatch)
{
COleVariant vntCollection;
vntCollection.pdispVal = pDispatch;
vntCollection.vt = VT_DISPATCH;
vntCollection.ChangeType(VT_UNKNOWN);
// From IUnknown interface, we can query to get the EnumVARIANT interface
IEnumVARIANT *pEnum;
HRESULT hr =
vntCollection.punkVal->QueryInterface(IID_IEnumVARIANT,(void**)&pEnum);
if (FAILED(hr)) {
fprintf(stderr, "Got an error getting the enumeration variant: %x",
hr);
return;
}
}
"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
email: agnickolov@mvps.org
MVP VC FAQ: http://www.mvps.org/vcfaq
=====================================
"Dave Moran" <dmoran@nospam.nospam> wrote in message
news:8C4B9FA5-CCF1-4EEE-AAB0-A617F260A3E2@microsoft.com...
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
Dave
"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
properties.
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
With sufficient thrust, pigs fly just fine. However, this is not
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
overhead. -- RFC 1925