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IWMSAdminNetworkDataSourcePlugin::get_SupportedProtocolName
The get_SupportedProtocolName method retrieves the name of a specific protocol from a list of supported protocols.
Syntax
HRESULT get_SupportedProtocolName( long dwProtocolNum, BSTR* pbstrProtocol );
Parameters
dwProtocolNum
[in] long containing the index. This must be either 0 or 1.
pbstrProtocol
[out] Pointer to a BSTR containing the protocol name.
Return Values
If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.
| Return code | Number | Description |
| E_INVALIDARG | 0x80070057 | The dwProtocolNum parameter is 0 or 1, but neither the HTTP protocol nor the RTSP protocol are supported, or the dwProtocolNum parameter is not 0 or 1. |
Remarks
If you specify 0 for the dwProtocolNum parameter, the server returns HTTP if it is supported. If you specify 0 for the dwProtocolNum parameter, and HTTP is not supported but RTSP is, the server returns RTSP. If you specify 1 for the dwProtocolNum parameter, and RTSP is supported, the server returns RTSP. The server does not return HTTP if you specify 1 for the dwProtocolNum parameter.
Example Code
#include <windows.h>
#include <atlbase.h> // Includes CComBSTR and CComVariant.
// To access system plug-in interfaces, the
// entire type library must be imported as shown.
#import "WMSServerTypeLib.dll" no_namespace named_guids \
raw_interfaces_only
// Declare variables and interfaces.
IWMSServer *pServer;
IWMSPlugins *pPlugins;
IWMSPlugin *pPlugin;
IDispatch *pDispatch;
IWMSAdminNetworkDataSourcePlugin *pAdminNetDataSrc;
HRESULT hr;
CComVariant varIndex;
CComBSTR bstrProtocol;
// 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 an IWMSPlugins interface
// containing data source plug-ins.
hr = pServer->get_DataSources(&pPlugins);
if (FAILED(hr)) goto EXIT;
// Retrieve a pointer to the IWMSPlugin interface
// of the plug-in to be configured.
varIndex = "WMS Network Data Source";
hr = pPlugins->get_Item(varIndex, &pPlugin);
if (FAILED(hr)) goto EXIT;
// Retrieve a pointer to the custom interface
// of the plug-in.
hr = pPlugin->get_CustomInterface(&pDispatch);
if (FAILED(hr)) goto EXIT;
// Query the specific administration interface
// for the plug-in.
hr = pDispatch->QueryInterface(IID_IWMSAdminNetworkDataSourcePlugin,
(void **)&pAdminNetDataSrc);
if (FAILED(hr)) goto EXIT;
// Retrieve the name of the first supported protocol.
hr = pAdminNetDataSrc->get_SupportedProtocolName(0, &bstrProtocol);
if (FAILED(hr)) goto EXIT;
EXIT:
// TODO: Release temporary COM objects and uninitialize COM.
Requirements
Library: WMSServerTypeLib.dll.
Platform: Windows Server 2003 family, Windows Server 2008 family.
See Also
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