IWMSDataSourcePlugin.GetRootDirectories (Visual Basic .NET)
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IWMSDataSourcePlugin.GetRootDirectories (Visual Basic .NET)
The server calls the GetRootDirectories method to retrieve the physical paths of the root directories associated with a data container.
Syntax
Parameters
pstrRootDirectoryList
Reference to a String array to be filled with the root directory paths.
dwMaxRoots
UInt32 containing the maximum number of root directories.
pCallback
IWMSDataSourcePluginCallback object containing the callback function. The plug-in calls IWMSDataSourcePluginCallback.OnGetRootDirectories to return the results to the server.
qwContext
UInt64 containing a value defined by the server to identify which GetRootDirectories request the plug-in is responding to when it calls IWMSDataSourcePluginCallback.OnGetRootDirectories. 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.
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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