IWMSAnnouncementStreamFormats::get_Item
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IWMSAnnouncementStreamFormats::get_Item
The get_Item method retrieves a specific URL or file path, by index, from the IWMSAnnouncementStreamFormats collection.
- Note This method is available only on Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition, and Windows Server 2008.
Syntax
HRESULT get_Item( VARIANT varIndex, BSTR* pVal );
Parameters
varIndex
[in] VARIANT containing the index.
pVal
[out] Pointer to a BSTR containing the file name.
Return Values
If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.
| Return code | Number | Description |
| DISP_E_BADINDEX | 0x8002000B | varIndex is an invalid index location. |
| E_POINTER | 0x80004003 | pVal is a NULL pointer argument. |
Example Code
#include <windows.h>
#include <atlbase.h> // Includes CComBSTR and CComVariant.
#include "wmsserver.h"
// Declare variables and interfaces.
IWMSServer *pServer;
IWMSPublishingPoints *pPubPoints;
IWMSPublishingPoint *pPubPoint;
IWMSBroadcastPublishingPoint *pBCPubPoint;
IWMSAnnouncementStreamFormats *pAnnounceStreamFormats;
HRESULT hr;
CComVariant varIndex;
CComBSTR bstrFile;
long lCount;
// Initialize the COM library and retrieve a pointer
// to an IWMSServer interface.
hr = CoInitialize(NULL);
hr = CoCreateInstance(CLSID_WMSServer,
NULL,
CLSCTX_ALL,
IID_IWMSServer,
(void **)&pServer);
if (FAILED(hr)) goto EXIT;
// Retrieve a pointer to the IWMSPublishingPoints
// interface and retrieve the number of publishing points.
hr = pServer->get_PublishingPoints(&pPubPoints);
if (FAILED(hr)) goto EXIT;
hr = pPubPoints->get_Count(&lCount);
if (FAILED(hr)) goto EXIT;
// Retrieve each publishing point and query the
// IWMSBroadcastPublishingPoint interface.
for (long x = 0; x < lCount; x++)
{
varIndex = x;
hr = pPubPoints->get_Item(varIndex, &pPubPoint);
if (FAILED(hr)) goto EXIT;
hr = pPubPoint->QueryInterface(IID_IWMSBroadcastPublishingPoint,
(void **)&pBCPubPoint);
if (FAILED(hr)) goto EXIT;
// Release temporary COM objects.
pPubPoint->Release();
if (SUCCEEDED(hr))
break;
}
// Retrieve a pointer to the IWMSAnnouncementStreamFormats
// interface.
hr = pBCPubPoint->get_AnnouncementStreamFormats(&pAnnounceStreamFormats);
if (FAILED(hr)) goto EXIT;
// Retrieve the file count contained in the
// IWMSAnnouncementStreamFormats interface.
hr = pAnnounceStreamFormats->get_Count(&lCount);
if (FAILED(hr)) goto EXIT;
// Retrieve each file path in the
// IWMSAnnouncementStreamFormats interface.
for (x = 0; x < lCount; x++)
{
varIndex = x;
hr = pAnnounceStreamFormats->get_Item(varIndex, &bstrFile);
if (FAILED(hr)) goto EXIT;
}
EXIT:
// TODO: Release temporary COM objects and uninitialize COM.
Requirements
Header: wmsserver.h.
Library: WMSServerTypeLib.dll.
Platform: Windows Server 2003 family, Windows Server 2008 family.
See Also
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