CMsgThread::ThreadMessageProc (Compact 2013)
3/26/2014
Processes requests. This is a pure virtual member function.
Syntax
virtual LRESULT ThreadMessageProc(
UINT uMsg,
DWORD dwFlags,
LPVOID lpParam,
CAMEvent* pEvent
);
Parameters
- uMsg
Request code.
- dwFlags
Optional flag parameter to request.
- lpParam
Optional pointer to extra data or a return data block.
- pEvent
Optional pointer to an event object.
Return Value
Any nonzero return causes the thread to exit. Returns zero unless an exit request has been processed recently.
Remarks
This pure virtual function must be overridden in your derived class. It is called once for each request queued by a call to the CMsgThread::PutThreadMsg member function.
The member function defines the four parameters. Typically, use the uMsg parameter to indicate the request, and the other three parameters will be optional additional parameters.
The calling application can supply a pointer to a CAMEvent object in the pEvent parameter if your application requires it. You must set this event after processing the event by using an expression, such as the following:
pEvent->SetEvent
One request code must be set aside to tell the worker thread to exit. Upon receiving this request, return 1 from this member function. Return 0 if you do not want the worker thread to exit.
Requirements
Header |
dshow.h, |
Library |
ole32.lib, |