waveInProc
The waveInProc
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 waveInOpen
function.
void CALLBACK waveInProc(
|
HWAVEIN hwi, |
|
|
UINT uMsg, |
|
|
DWORD dwInstance, |
|
|
DWORD dwParam1, |
|
|
DWORD dwParam2 |
|
|
); |
|
Parameters
hwi
Handle of the
waveform-audio device associated with the callback function.
uMsg
Waveform-audio
input message. It can be one of the following messages:
WIM_CLOSE
Sent when the
device is closed using the waveInClose function.
WIM_DATA
Sent when the
device driver is finished with a data block sent using the waveInAddBuffer function.
WIM_OPEN
Sent when the
device is opened using the waveInOpen function.
dwInstance
User instance
data specified with waveInOpen.
dwParam1
Message
parameters.
dwParam2
Message
parameters.
Return Values
This function
does not return a value.
Remarks
Applications
should not call any system-defined functions from inside a callback function,
except for EnterCriticalSection, LeaveCriticalSection, midiOutLongMsg,
midiOutShortMsg, OutputDebugString, PostMessage, PostThreadMessage,
SetEvent, timeGetSystemTime, timeGetTime, timeKillEvent,
and timeSetEvent. Calling other wave functions will cause deadlock.
See Also