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IWMSDataSourcePlugin.GetDataContainerVersion (Visual Basic .NET)

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IWMSDataSourcePlugin.GetDataContainerVersion (Visual Basic .NET)

This server calls the GetDataContainerVersion method to retrieve version information about cached content.

Syntax

Parameters

pCommandContext

IWMSCommandContext object containing a command context.

pUserContext

IWMSContext object containing a user context.

pPresContext

IWMSContext object containing a presentation context.

pszContainerName

String containing the container name.

dwFlags

Reserved for future use.

pCallback

IWMSDataSourcePluginCallback object containing the callback function. The plug-in calls IWMSDataSourcePluginCallback.OnGetDataContainerVersion to return the results to the server.

qwContext

ulong containing a value defined by the server to identify which GetDataContainerVersion request the plug-in is responding to when it calls IWMSDataSourcePluginCallback.OnGetDataContainerVersion. The plug-in must pass this value back unaltered.

Return Values

This method does not return a value. To report an error, the plug-in can throw a COMException object to the server. If the plug-in uses the IWMSEventLog object to log error information, it is recommended that it throw NS_E_PLUGIN_ERROR_REPORTED (0xC00D157D). Typically, the server attempts to make plug-in error information available to the server object model, the Windows Event Viewer, and the troubleshooting list in the details pane of the Windows Media Services MMC. However, if the plug-in uses the IWMSEventLog object to send custom error information to the Windows Event Viewer, throwing NS_E_PLUGIN_ERROR_REPORTED stops the server from also logging to the event viewer. For more information about plug-in error information, see Identifying Plug-in Errors.

Remarks

The data source plug-in must set information about the data container into an IWMSDataContainerVersion object. It returns a reference to this object when it calls IWMSDataSourcePluginCallback.OnGetDataContainerVersion.

Requirements

Reference: Add a reference to Microsoft.WindowsMediaServices.

Namespace: Microsoft.WindowsMediaServices.Interop.

Assembly: Microsoft.WindowsMediaServices.dll.

Library: WMSServerTypeLib.dll.

Platform: Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition; and Windows Server 2008.

See Also

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