Strong/Weak Marshaling of Proxies Is Not SupportedLast reviewed: March 14, 1996Article ID: Q148374 |
The information in this article applies to:
SUMMARYMarshaling a proxy of an interface belonging to another thread or process is supported with MSHLFLAGS_NORMAL, but it is not supported with MSHLFLAGS_TABLESTRONG or MSHLFLAGS_TABLEWEAK. This means that CoMarshalInterface with MSHLFLAGS_TABLESTRONG/MSHLFLAGS_TABLEWEAK and IRunningObjectTable::Register will return E_INVALIDARG for proxies.
MORE INFORMATIONWhen an interface is marshaled to another thread or process, a proxy of the interface is created in that thread or process. This proxy cannot be marshaled again using the MSHLFLAGS_TABLESTRONG or MSHLFLAGS_TABLEWEAK values of the MSHLFLAGS enumerator. However it can be marshaled using MSHLFLAGS_NORMAL. Marshaling of interfaces that are not proxies are supported using any of the MSHLFLAGS enumerator values. IRunningObjectTable::Register will marshal the interface pointer given to it by using MSHLFLAGS_TABLESTRONG or MSHLFLAGS_TABLEWEAK, as specified by the grfFlags parameter. Consequently IRunningObjectTable::Register will fail with E_INVALIDARG if is asked to register a proxy. Windows 3.x supported marshaling of proxies using MSHLFLAGS_TABLESTRONG and MSHLFLAGS_TABLEWEAK. This is not supported on Windows 95 or Windows NT.
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Additional reference words: 2 OLE2 2.0 2.00
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