IAudioSystemEffectsPropertyStore::OpenVolatilePropertyStore method (mmdeviceapi.h)

Article
02/03/2023

Opens the audio system effects volatile property store.

Syntax

HRESULT OpenVolatilePropertyStore(
  DWORD          stgmAccess,
  IPropertyStore **propStore
);

Parameters

stgmAccess

The storage-access mode. This parameter specifies whether to open the property store in read mode, write mode, or read/write mode. Set this parameter to one of the following STGM constants:

STGM_READ

STGM_WRITE

STGM_READWRITE

The method permits a client running as an administrator to open a store for read-only, write-only, or read/write access. A client that is not running as an administrator is restricted to read-only access.

propStore

Receives a pointer to an IPropertyStore representing the volatile property store.

Return value

Returns an HRESULT including, but not limited to the following:

Value	Description
S_OK	Success
E_NOTFOUND	The call is attempting to open a property store that does not exist. See Remarks.
E_ACCESSDENIED	The caller was denied access for the specified stgmAccess value

Remarks

This method will only open existing property stores under the context registry keys. It will not create a new key if one is not present in the associated INF file. Attempting to access a property store that does not already exist will result in an E_NOTFOUND error.

For more information on the Windows 11 APIs for the Audio Processing Objects (APOs) that can ship with audio drivers, see Windows 11 APIs for Audio Processing Objects.

Requirements

Requirement	Value
Minimum supported client	Windows Build 22000
Header	mmdeviceapi.h

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