Partager via

CMsg::CMsg

  • Article
 
Microsoft DirectShow 9.0

CMsg::CMsg

CMsg Class

Constructs a CMsg object.

Syntax

  CMsg(
  UINT u,
  DWORD dw,
  LPVOID lp,
  CAMEvent *pEvent
);

Parameters

u

Request code, defined by the client of the thread class and understood by the overridden worker thread function.

dw

Flag parameter to the request code.

lp

Pointer to data required by the worker thread as parameter or return values. This data should not be stack-based, as it will be referenced some time after completing the queuing operation.

pEvent

Pointer to the event object that a worker thread can signal to indicate the completion of the operation.

Return Value

No return value.

Remarks

This member function contains a request for a CMsgThread worker thread to act on. All the parameters are passed to the worker thread function as parameters when this message gets processed. The meanings of the parameters are defined by the client function that calls the worker thread and the derived class that supplies the worker thread's execution function.

Requirements

**  Header:** Declared in Msgthrd.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).