IWMSDataSourcePluginCallback.OnOpenDirectory (Visual Basic .NET)
The OnOpenDirectory method is called by a data source plug-in to respond when the server calls IWMSDataSourcePlugin.OpenDirectory.
IWMSDataSourcePluginCallback.OnOpenDirectory( hr As Int32, pDirectory As IWMSDirectory, qwContext As UInt64 )
Int32 containing the result of the call to IWMSDataSourcePlugin.OpenDirectory.
IWMSDirectoryIWMSDirectory Object (Visual Basic .NET) that contains information about the subdirectories and media files in the directory.
UInt64 containing a value defined by the server to identify which IWMSDataSourcePlugin.OpenDirectory request the plug-in is responding to when it calls OnOpenDirectory. The plug-in must pass this value back unaltered.
This method does not return a value. If the plug-in uses the IWMSEventLogIWMSEventLog Object (Visual Basic .NET) to log error information, it is recommended that it send NS_E_PLUGIN_ERROR_REPORTED (0xC00D157D) to the server in the lHr parameter. 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 log custom error information to the Windows Event Viewer, sending 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.
Reference: Add a reference to Microsoft.WindowsMediaServices.
Platform: Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition; and Windows Server 2008.