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Processes requests. This is a pure virtual member function.
Syntax
virtual LRESULT ThreadMessageProc( UINT uMsg, DWORD dwFlags, LPVOID lpParam, CAMEvent* pEvent ); |
Parameters
- uMsg
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Request code.
- dwFlags
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Optional flag parameter to request.
- lpParam
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Optional pointer to extra data or a return data block.
- pEvent
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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::PutThreadMsgmember function.
The member function defines the four parameters. Typically, use the uMsgparameter to indicate the request, and the other three parameters will be optional additional parameters.
The calling application can supply a pointer to a CAMEventobject in the pEventparameter if your application requires it. You must set this event after processing the event by using an expression, such as the following:
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pEvent->SetEvent |
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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
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have
different include file and Library requirements
For more information, see Setting Up the Build Environment,Version 2.12 requires DXPAK 1.0 or later |