The MM_WIM_DATA message is sent to a window when waveform-audio data is
present in the input buffer and the buffer is being returned to the application. The
message can be sent either when the buffer is full or after the waveInReset
function is called.
wParam = (WPARAM) hInputDev
lParam = (LONG) lpwvhdr
Handle of the waveform-audio input device that received the data.
Address of a WAVEHDR
structure that identifies the buffer containing the data.
This message does not return a value.
The returned buffer might not be full. Use the dwBytesRecorded
member of the WAVEHDR
structure specified by lParam
to determine the number of bytes recorded into the returned buffer.
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