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Retrieves attributes of properties on an IMessage object supplied by the OpenIMsgOnIStg function.

Header file:


Implemented by:


Called by:

Client applications and message store providers

HRESULT GetAttribIMsgOnIStg(
  LPVOID lpObject,
  LPSPropTagArray lpPropTagArray,
  LPSPropAttrArray FAR * lppPropAttrArray



[in] Pointer to an IMessage object obtained from the OpenIMsgOnIStg function.


[in] Pointer to an SPropTagArray structure that contains an array of property tags indicating the properties for which attributes are to be retrieved.


[out] Pointer to a pointer to the returned SPropAttrArray structure that contains the retrieved property attributes.


The call succeeded and has returned the expected value or values.


The call succeeded overall, but one or more properties could not be accessed and were returned with a property type of PT_ERROR.

Property attributes can only be accessed on property objects, that is, objects implementing the IMAPIProp : IUnknown interface. To make MAPI properties available on an OLE structured storage object, OpenIMsgOnIStg builds an IMessage : IMAPIProp object on top of the OLE IStorage object. The property attributes on such objects can be set or altered with SetAttribIMsgOnIStg and retrieved with GetAttribIMsgOnIStg.


  GetAttribIMsgOnIStg and SetAttribIMsgOnIStg do not operate on all IMessage objects. They are only valid for IMessage-on-IStorage objects returned by OpenIMsgOnIStg.

The number and positions of the attributes in the lppPropAttrArray parameter correspond to the number and positions of the property tags in the lpPropTagArray parameter.

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