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Autodocs
 Libraries:
 commodities.library
  ActivateCxObj
  AddIEvents
  AttachCxObj
  ClearCxObjError
  CreateCxObj
  CxBroker
  CxMsgData
  CxMsgID
  CxMsgType
  CxObjError
  CxObjType
  DeleteCxObj
  DeleteCxObjAll
  DisposeCxMsg
  DivertCxMsg
  EnqueueCxObj
  InsertCxObj
  InvertKeyMap
  MatchIX
  ParseIX
  RemoveCxObj
  RouteCxMsg
  SetCxObjPri
  SetFilter
  SetFilterIX
  SetTranslate
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GuruMeditation
Docs » Autodocs » commodities.library » CxMsgData

NAME

	CxMsgData -- obtain a pointer to a commodity message's data area. (V36)

SYNOPSIS

	data = CxMsgData(cxm);
	D0		 A0
	APTR CxMsgData(struct CxMsg *);

FUNCTION

	Most commodity messages contain meaningful data such as an InputEvent
	structure. This function returns a pointer to this data.
	You may get a commodity message from a synchronous (custom object) or
	asynchronous (sender object) source. In the second case, 'data' is
	not valid after you have replied to the message.

INPUTS

	cxm - the commodity message to get the data pointer from (may be NULL)

RESULT

	data - a pointer to the message's data, or NULL if 'cxm' is NULL.
	       The meaning of the data varies depending on which kind of
	       object is being inspected.

BUGS

	Until V38, passing a NULL 'cxm' parameter would cause low-memory
	access and unpredictable results.
	Until V40, whenever the data pointer is a (struct InputEvent), the
	ie_EventAddress field of these structures was not reliable whenever
	the message was generated by a sender object.

SEE ALSO

cx_lib/CxSender, cx_lib/CxCustom

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