CoGetMarshalSizeMax

Retrieves an upper bound on the number of bytes needed to marshal the specified interface pointer on the specified object.

STDAPI CoGetMarshalSizeMax(

ULONG *pulSize,	//Receives maximum size
REFIID riid,	//Identifies interface to be marshalled
IUnknown * pUnk,	//Interface pointer to be marshaled
DWORD dwDestContext,	//Specifies destination process
LPVOID pvDestContext,	//Reserved for future use
DWORD mshlflags	//Specifies reason for marshalling
);

Parameters

pulSize

Receives the maximum marshal size; a value of zero means that the size of the data is unknown.

riid

Specifies the IID of the interface pointer to be marshalled. This interface must be derived from the IUnknown interface.

pUnk

Indicates the interface pointer to be marshalled; can be NULL.

dwDestContext

Specifies the destination context, that is, the process in which the unmarshaling will be done. The legal values for dwDestContext are taken from the enumeration MSHCTX.

pvDestContext

Indicates reserved for use with future MSHCTX values. This must be set to NULL.

mshlflags

Specifies why marshalling is taking place. The legal values for mshlflags are taken from the enumeration MSHLFLAGS.

Return Values

S_OK

Indicates the upper bound was returned successfully.

CO_E_NOTINITIALIZED

Indicates the CoInitialize or OleInitialize function was not called on the current thread before this function was called.

E_UNEXPECTED

Indicates an unexpected error occurred.

Comments

You typically call this function before calling the CoMarshalInterface function. See the description of that function for information on calling these functions.

See Also

CoMarshalInterface, IMarshal::GetMarshalSizeMax

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