Using Win32 functions in Visual FoxPro Image Gallery
Windows Multimedia
..msdn
AVIFileExit
AVIFileGetStream
AVIFileInfo
AVIFileInit
AVIFileOpen
AVIFileRelease
AVIFileWriteData
AVIStreamGetFrame
AVIStreamGetFrameClose
AVIStreamGetFrameOpen
AVIStreamInfo
AVIStreamLength
AVIStreamReadFormat
AVIStreamRelease
AVIStreamStart
AVIStreamTimeToSample
capCreateCaptureWindow
capGetDriverDescription
DrawDibClose
DrawDibDraw
DrawDibOpen
mciGetDeviceID
mciGetErrorString
mciSendCommand
mciSendString
midiOutClose
midiOutGetDevCaps
midiOutGetNumDevs
midiOutOpen
midiOutReset
midiOutShortMsg
mixerClose
mixerGetControlDetails
mixerGetDevCaps
mixerGetID
mixerGetLineControls
mixerGetLineInfo
mixerGetNumDevs
mixerOpen
mixerSetControlDetails
mmioAscend
mmioClose
mmioCreateChunk
mmioDescend
mmioFlush
mmioOpen
mmioRead
mmioSeek
mmioWrite
PlaySound
sndPlaySound
timeGetDevCaps
waveInAddBuffer
waveInClose
waveInGetDevCaps
waveInGetErrorText
waveInGetNumDevs
waveInGetPosition
waveInOpen
waveInPrepareHeader
waveInReset
waveInStart
waveInStop
waveInUnprepareHeader
waveOutClose
waveOutGetDevCaps
waveOutGetErrorText
waveOutGetNumDevs
waveOutGetPosition
waveOutGetVolume
waveOutOpen
waveOutPrepareHeader
waveOutReset
waveOutSetVolume
waveOutUnprepareHeader
waveOutWrite
Code examples:
Playing WAV sounds simultaneously
WAV file player
waveOutUnprepareHeader
..msdn    Add comment     W32 Constants      Translate this page
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.
Code examples:
Playing WAV sounds simultaneously
WAV file player
Declaration:
MMRESULT waveOutUnprepareHeader(
  HWAVEOUT hwo,  
  LPWAVEHDR pwh, 
  UINT cbwh      
);
FoxPro declaration:
DECLARE INTEGER waveOutUnprepareHeader IN winmm;
    INTEGER   hwi,;
    STRING  @ pwh,;
    INTEGER   cbwh

Parameters:
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.
Return value:
Returns MMSYSERR_NOERROR (0) if successful or an error otherwise.
My comment:
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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Created: 2003-07-23 08:15:18
Modified: 2003-07-23 08:17:13
Visited in last 7 days: 9
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