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waveOutOpen
..msdn Add comment W32 Constants Translate this page |
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The waveOutOpen function opens the given waveform-audio output device for playback. |
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| Declaration: |
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MMRESULT waveOutOpen(
LPHWAVEOUT phwo,
UINT_PTR uDeviceID,
LPWAVEFORMATEX pwfx,
DWORD_PTR dwCallback,
DWORD_PTR dwCallbackInstance,
DWORD fdwOpen
);
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| FoxPro declaration: |
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DECLARE INTEGER waveOutOpen IN winmm;
INTEGER @ phwo,;
INTEGER uDeviceID,;
STRING @ pwfx,;
INTEGER dwCallback,;
INTEGER dwCallbackInst,;
INTEGER fdwOpen
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| Parameters: |
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phwo
Pointer to a buffer that receives a handle identifying the open waveform-audio output device.
uDeviceID
Identifier of the waveform-audio output device to open.
pwfx
Pointer to a WAVEFORMATEX structure that identifies the format of the waveform-audio data to be sent to the device.
dwCallback
Pointer to a fixed callback function, an event handle, a handle to a window, or the identifier of a thread to be called during waveform-audio playback to process messages related to the progress of the playback.
dwCallbackInstance
User-instance data passed to the callback mechanism. This parameter is not used with the window callback mechanism.
fdwOpen
Flags for opening the device. The following values are defined. |
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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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Use the waveOutGetNumDevs function to determine the number of waveform-audio output devices present in the system. If the value specified by the uDeviceID parameter is a device identifier, it can vary from zero to one less than the number of devices present.
The WAVE_MAPPER constant can also be used as a device identifier.
If you choose to have a function receive callback information, the following messages are sent to the function to indicate the progress of waveform-audio output: WOM_OPEN, WOM_CLOSE, and WOM_DONE. |
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| Word Index links for the waveOutOpen : |
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| Created: | 2003-07-23 08:02:33 | | Modified: | 2003-07-23 08:06:22 |
Visited in last 7 days: 44 |
Playing WAV sounds simultaneously