WAV_IOControl (Windows Embedded CE 6.0)

[アーティクル]
01/05/2012

1/6/2010

This function is the Device I/O control routine for the WAV I/O device.

Syntax

BOOL WAV_IOControl(
  DWORD dwOpenData,
  DWORD dwCode,
  PBYTE pBufIn,
  DWORD dwLenIn,
  PBYTE pBufOut,
  DWORD dwLenOut,
  PDWORD pdwActualOut 
);

Parameters

dwOpenData
Specifies a value returned from a call to the WAV_Open function.

dwCode
Specifies an I/O control (IOCTL) code for this function to be performed. This parameter supports two IOCTL codes, IOCTL_WAV_MESSAGE and IOCTL_MIX_MESSAGE.

IOCTL_WAV_MESSAGE is useful for sending messages to a WAV device audio driver (wavedev.dll). IOCTL_MIX_MESSAGE is useful for supporting the hardware mixer middleware extensions to the wave audio streaming driver model.

pBufIn
Pointer to a MMDRV_MESSAGE_PARAMS structure.

dwLenIn
Specifies the size, in bytes, of input parameter structure (sizeof(MMDRV_MESSAGE_PARAMS)). The size of the DSDVR_MESSAGE_PARAMS structure that matches the DSDVR_MESSAGE_PARAMS message.

pBufOut
Pointer to the return value (DWORD).

dwLenOut
Specifies the size of the return value variable (sizeof(DWORD)).

pdwActualOut
Not used.

Return Value

TRUE indicates success. FALSE indicates failure.

Requirements

Header	wavemdd.h
Windows Embedded CE	Windows CE 1.0 and later

See Also

Reference

Waveform Audio Driver Functions
WAV_Open
MMDRV_MESSAGE_PARAMS