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CMsg Class (Windows Embedded CE 6.0)

1/6/2010

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The CMsgThread class provides support for a worker thread to which requests can be posted asynchronously instead of sent directly.

The CAMThread class provides a worker thread to which single requests can be sent.

Only one client can make a request at a time, and the client blocks until the worker thread has completed the request. By contrast, the CMsgThread class provides a worker thread to which any number of requests can be posted.

The requests (in the form of a CMsg object) are queued and executed in order, asynchronously.

No reply or return value is received.

Data Members

Member Description

dwFlags

Flag parameter to the request code.

lpParam

Data required by the worker thread as parameter or return values.

This data should not be stack-based, because it is referenced some time after completing the queuing operation.

pEvent

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

uMsg

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

Member Functions

Member function Description

CMsg

Constructs a CMsg object.

Requirements

Windows Embedded CE Windows CE 2.12 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

See Also

Reference

DirectShow Classes