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This function is the callback function used with the waveform-audio input device. This function is a placeholder for the application-defined function name. The address of this function can be specified in the callback-address parameter of the waveInOpenfunction.
Syntax
void CALLBACK waveInProc( HWAVEIN hwi, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 ); |
Parameters
- hwi
-
Handle to the waveform-audio device associated with the callback function.
- uMsg
-
Waveform-audio input message. It can be one of the messages shown in the following table.
Message Description Sent when the device is closed using the waveInClosefunction.
Sent when the device driver is finished with a data block sent using the waveInAddBufferfunction.
Sent when the device is opened using the waveInOpenfunction.
- dwInstance
-
User instance data specified with waveInOpen.
- dwParam1
-
Message parameter.
- dwParam2
-
Message parameter.
Return Value
None.
Remarks
Applications should not call any system-defined functions from inside a callback function, except for EnterCriticalSection, LeaveCriticalSection, OutputDebugString, PostMessage, PostThreadMessage, and SetEvent. Calling other wave functions will cause deadlock.
Requirements
Header | mmsystem.h |
Library | coredll.lib |
Windows Embedded CE | Windows CE 2.0 and later |
Windows Mobile | Windows Mobile Version 5.0 and later |
See Also
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