IMMDevice interface (mmdeviceapi.h)
The IMMDevice interface encapsulates the generic features of a multimedia device resource. In the current implementation of the MMDevice API, the only type of device resource that an IMMDevice interface can represent is an audio endpoint device.
A client can obtain an IMMDevice interface from one of the following methods:
- IMMDeviceCollection::Item
- IMMDeviceEnumerator::GetDefaultAudioEndpoint
- IMMDeviceEnumerator::GetDevice
After obtaining the IMMDevice interface of an audio endpoint device, a client can obtain an interface that encapsulates the endpoint-specific features of the device by calling the IMMDevice::QueryInterface method with parameter iid set to REFIID IID_IMMEndpoint. For more information, see IMMEndpoint Interface.
For code examples that use the IMMDevice interface, see the following topics:
Inheritance
The IMMDevice interface inherits from the IUnknown interface. IMMDevice also has these types of members:
Methods
The IMMDevice interface has these methods.
| IMMDevice::Activate The Activate method creates a COM object with the specified interface. |
| IMMDevice::GetId The GetId method retrieves an endpoint ID string that identifies the audio endpoint device. |
| IMMDevice::GetState The GetState method retrieves the current device state. |
| IMMDevice::OpenPropertyStore The OpenPropertyStore method retrieves an interface to the device's property store. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2008 [desktop apps only] |
| Target Platform | Windows |
| Header | mmdeviceapi.h |
See also
IMMDeviceEnumerator::GetDefaultAudioEndpoint