acmFilterDetailsA function

The acmFilterDetails function queries the ACM for details about a filter with a specific waveform-audio filter tag.


MMRESULT ACMAPI acmFilterDetailsA(
  HACMDRIVER          had,
  DWORD               fdwDetails



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


Pointer to the ACMFILTERDETAILS structure that is to receive the filter details for the given filter tag.


Flags for getting the details. The following values are defined.

Value Meaning
ACM_FILTERDETAILSF_FILTER A WAVEFILTER structure pointed to by the pwfltr member of the ACMFILTERDETAILS structure was given and the remaining details should be returned. The dwFilterTag member of the ACMFILTERDETAILS structure must be initialized to the same filter tag pwfltr specifies. This query type can be used to get a string description of an arbitrary filter structure. If an application specifies an ACM driver handle for had, details on the filter will be returned for that driver. If an application specifies NULL for had, the ACM finds the first acceptable driver to return the details.
ACM_FILTERDETAILSF_INDEX A filter index for the filter tag was given in the dwFilterIndex member of the ACMFILTERDETAILS structure. The filter details will be returned in the structure defined by pafd. The index ranges from zero to one less than the cStandardFilters member returned in the ACMFILTERTAGDETAILS structure for a filter tag. An application must specify a driver handle for had when retrieving filter details with this flag. For information about what members should be initialized before calling this function, see the ACMFILTERDETAILS structure.

Return Value

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

Return code Description
The details requested are not available.
At least one flag is invalid.
The specified handle is invalid.
At least one parameter is invalid.


Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header msacm.h
Library Msacm32.lib
DLL Msacm32.dll

See Also

Audio Compression Functions

Audio Compression Manager