This section gives the required and optional messages for auxiliary audio device drivers. For detailed information on these messages, see the reference section later in this chapter.
The auxMessage entry-point function for auxiliary audio device drivers must support the following messages.
AUXDM_GETDEVCAPS | Requests the capabilities of an auxiliary input device. |
AUXDM_GETNUMDEVS | Requests the number of auxiliary input devices a driver supports. |
The auxMessage entry-point function for auxiliary audio device drivers can optionally support the following messages, depending on the capabilities of the target hardware.
AUXDM_GETVOLUME | Requests the current volume level setting on an auxiliary audio device. |
AUXDM_SETVOLUME | Sets the volume level on an auxiliary audio device. |