HRESULT Activate(ref Guid iid, int dwClsCtx, IntPtr pActivationParams, out IntPtr ppInterface) HRESULT Activate(ref Guid iid, int dwClsCtx, ref PROPVARIANT pActivationParams, out IntPtr ppInterface) HRESULT Item(uint nDevice, out IMMDevice ppDevice) Public const int DEVICE_STATEMASK_ALL = 0x0000000f Public const int DEVICE_STATE_UNPLUGGED = 0x00000008
Public const int DEVICE_STATE_NOTPRESENT = 0x00000004 Public const int DEVICE_STATE_DISABLED = 0x00000002 Public const int DEVICE_STATE_ACTIVE = 0x00000001 HRESULT UnregisterEndpointNotificationCallback(IMMNotificationClient pClient) HRESULT RegisterEndpointNotificationCallback(IMMNotificationClient pClient) HRESULT GetDevice(string pwstrId, out IMMDevice ppDevice) HRESULT GetDefaultAudioEndpoint(EDataFlow dataFlow, ERole role, out IMMDevice ppEndpoint) HRESULT EnumAudioEndpoints(EDataFlow dataFlow, int dwStateMask, out IMMDeviceCollection ppDevices) Public const int STGM_READWRITE = 0x00000002 Public const int STGM_WRITE = 0x00000001 HRESULT SetValue( ref PROPERTYKEY key, ref PROPVARIANT pv) HRESULT GetValue( ref PROPERTYKEY key, out PROPVARIANT pv) HRESULT GetAt( uint propertyIndex, out PROPERTYKEY key) HRESULT GetCount( out uint propert圜ount)
Class audiodevice interopservices code#
Here is the code to get the available audio devices in the system : // At beginningĮ_NOINTERFACE = unchecked((int)0x80004002), But I want to know the default audio devices from those devices and that should give as a separate option as "system default" in my WPF audio selection settings. Int Activate(ref System.I have a WPF application, where my application have a settings that can show the list of available audio devices in the system. Int SetMute( bool bMute, System.Guid pguidEventContext) Int GetMasterVolumeLevelScalar(out float pfLevel) Int SetMasterVolumeLevelScalar(float fLevel, System.Guid pguidEventContext) Because headphones and speakers will have different audio settings, the loop ensures that the audio is adjusted if a user plugs in a different audio device during the test.Īdd-Type -TypeDefinition The script will end after 15 minutes of looping. It will continue to loop every 30 seconds. When the user first logs in, it will adjust the audio. This script is linked as a PowerShell logon script for our users when testing. My second instinct was the internet. The PowerShell script below will unmute the computer and raise the audio to 90%. Fortunately, I didn’t first try unmuting a computer by running no-volume. Unfortunately, that cmdlet has nothing to do with sound as it is part of the storage module. I searched the cmdlets for volume and saw a very promising cmdlet named Set-Volume. My first instinct was to start with PowerShell. We ran into this exact problem during a recent practice run. This setup works great unless something actually needs to be changed – like unmuting the audio or adjusting the volume. Labs either automatically login (if reserved for testing) or students use a generic username/password. A common setup is to use a custom user interface with a mandatory profile as this simplifies the entire process. Many schools are gearing up for standardized testing season.
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