3.1.4.14.3 GetMetadata (Opnum 5)
The GetMetadata method is received by the server in an RPC_REQUEST packet. In response, the server returns the specific element of named metadata.
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HRESULT GetMetadata( [in] BSTR bstrMetadataType, [out, retval] VARIANT* pValue );
bstrMetadataType: The name of the metadata property to fetch. Valid names are as follows.
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Value
Meaning
"extension"
Returns a string that identifies the server-side extension that implements this IAppHostElementSchema instance, if one exists, or NULL otherwise. The client can use this metadata property to query if the IAppHostElementSchema has a server-side extension. The actual contents of the string are implementation-specific and MUST be ignored by the client.
pValue: Contains a VARIANT that represents the metadata that is retrieved.
Return Values: The server MUST return zero if it successfully processes the message that is received from the client. If processing fails, the server MUST return a nonzero HRESULT code as defined in [MS-ERREF]. The following table describes the error conditions that MUST be handled and the corresponding error codes. A server MAY return additional implementation-specific error codes.
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Return value/code
Description
0X00000000
NO_ERROR
The operation completed successfully.
0X80070057
ERROR_INVALID_PARAMETER
One or more parameters are incorrect or null.
0X80070032
ERROR_NOT_SUPPORTED
The metadata property specified by bstrMetadataType is not supported.
0X00000008
ERROR_NOT_ENOUGH_MEMORY
Not enough memory is available to process this command.