3.1.4.17.2 Schema (Opnum 4)

The Schema method is received by the server in an RPC_REQUEST packet. In response, the server returns the schema and constraints for the specified custom IAppHostMethod.

 [propget] HRESULT Schema(
   [out, retval] IAppHostMethodSchema** ppMethodSchema
 );

ppMethodSchema: Contains the schema of the specified IAppHostMethod.

Return Values: The server MUST return zero if it successfully processes the message that is received from the client. In this case, *ppMethodSchema is not NULL. 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.

Return value/code

Description

0X00000000

NO_ERROR

The operation completed successfully.

0X80070057 

ERROR_INVALID_PARAMETER

One or more parameters are incorrect or null.