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waveOutPrepareHeader The waveOutPrepareHeader function prepares a waveform-audio data block for playback.
VB4-32,5,6
Declare Function waveOutPrepareHeader Lib "winmm.dll" Alias "waveOutPrepareHeader" (ByVal hWaveOut As Long, lpWaveOutHdr As WAVEHDR, ByVal uSize As Long) As Long |
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Operating Systems Supported |
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Requires Windows NT 3.1 or later; Requires Windows 95 or later |
- hwo
Handle of the waveform-audio output device.
- pwh
Address of a WAVEHDR structure that identifies the data block to be prepared.
- cbwh
Size, in bytes, of the WAVEHDR structure. |
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following.
MMSYSERR_INVALHANDLE Specified device handle is invalid.
MMSYSERR_NODRIVER No device driver is present.
MMSYSERR_NOMEM Unable to allocate or lock memory. |
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