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waveOutUnprepareHeader
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The waveOutUnprepareHeader function cleans up the preparation performed by the waveOutPrepareHeader function. This function must be called after the device driver is finished with a data block. You must call this function before freeing the buffer. |
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| Code examples: |
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| Declaration: |
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MMRESULT waveOutUnprepareHeader(
HWAVEOUT hwo,
LPWAVEHDR pwh,
UINT cbwh
);
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| FoxPro declaration: |
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DECLARE INTEGER waveOutUnprepareHeader IN winmm;
INTEGER hwi,;
STRING @ pwh,;
INTEGER cbwh
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| Parameters: |
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hwo
Handle to the waveform-audio output device.
pwh
Pointer to a WAVEHDR structure identifying the data block to be cleaned up.
cbwh
Size, in bytes, of the WAVEHDR structure. |
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| Return value: |
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| Returns MMSYSERR_NOERROR (0) if successful or an error otherwise. |
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| My comment: |
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This function complements waveOutPrepareHeader. You must call this function before freeing the buffer.
After passing a buffer to the device driver with the waveOutWrite function, you must wait until the driver is finished with the buffer before calling waveOutUnprepareHeader. |
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| Word Index links for the waveOutUnprepareHeader : |
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| Created: | 2003-07-23 08:15:18 | | Modified: | 2003-07-23 08:17:13 |
Visited in last 7 days: 15 |
Playing WAV sounds simultaneously