Windows Dev Center

Collapse the table of content
Expand the table of content
Expand Minimize
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.

acmFilterDetails function

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


MMRESULT acmFilterDetails(
   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_FILTERA 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_INDEXA 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 codeDescription

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]







Unicode and ANSI names

acmFilterDetailsW (Unicode) and acmFilterDetailsA (ANSI)

See also

Audio Compression Manager
Audio Compression Functions



Community Additions

© 2015 Microsoft