Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

acmFormatTagEnum function

The acmFormatTagEnum function enumerates waveform-audio format tags available from an ACM driver. This function continues enumerating until there are no more suitable format tags or the callback function returns FALSE.

Syntax


MMRESULT acmFormatTagEnum(
  HACMDRIVER had,
  LPACMFORMATTAGDETAILS paftd,
  ACMFORMATTAGENUMCB fnCallback,
  DWORD_PTR dwInstance,
  DWORD fdwEnum
);

Parameters

had

Handle to the ACM driver to query for waveform-audio format tag details. If this parameter is NULL, the ACM uses the details from the first suitable ACM driver.

paftd

Pointer to the ACMFORMATTAGDETAILS structure that is to receive the format tag details passed to the function specified in fnCallback. This structure must have the cbStruct member of the ACMFORMATTAGDETAILS structure initialized.

fnCallback

Procedure instance address of the application-defined callback function.

dwInstance

A 64-bit (DWORD_PTR) or 32-bit (DWORD) application-defined value that is passed to the callback function along with ACM format tag details.

fdwEnum

Reserved; must be zero.

Return value

Returns zero if successful or an error otherwise. Possible error values include the following.

Return codeDescription
MMSYSERR_INVALFLAG

At least one flag is invalid.

MMSYSERR_INVALHANDLE

The specified handle is invalid.

MMSYSERR_INVALPARAM

At least one parameter is invalid.

 

Remarks

This function will return MMSYSERR_NOERROR (zero) if no suitable ACM drivers are installed. Moreover, the callback function will not be called.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Msacm.h

Library

Msacm32.lib

DLL

Msacm32.dll

Unicode and ANSI names

acmFormatTagEnumW (Unicode) and acmFormatTagEnumA (ANSI)

See also

Audio Compression Manager
Audio Compression Functions

 

 

Community Additions

Show:
© 2014 Microsoft