AUXCAPS structure

The AUXCAPS structure describes the capabilities of an auxiliary output device.

Syntax

typedef struct {
  WORD      wMid;
  WORD      wPid;
  MMVERSION vDriverVersion;
  TCHAR     szPname[MAXPNAMELEN];
  WORD      wTechnology;
  WORD      wReserved1;
  DWORD     dwSupport;
} AUXCAPS;

Members

• wMid
  Manufacturer identifier for the device driver for the auxiliary audio device. Manufacturer identifiers are defined in Manufacturer and Product Identifiers.

• wPid
  Product identifier for the auxiliary audio device. Currently, no product identifiers are defined for auxiliary audio devices.

• vDriverVersion
  Version number of the device driver for the auxiliary audio device. The high-order byte is the major version number, and the low-order byte is the minor version number.

• szPname
  Product name in a null-terminated string.

• wTechnology
  Type of the auxiliary audio output:

  Name	Description
  AUXCAPS_AUXIN	Audio output from auxiliary input jacks.
  AUXCAPS_CDAUDIO	Audio output from an internal CD-ROM drive.

   

• wReserved1
  Padding.

• dwSupport
  Describes optional functionality supported by the auxiliary audio device.

  Name	Description
  AUXCAPS_LRVOLUME	Supports separate left and right volume control.
  AUXCAPS_VOLUME	Supports volume control.

   

  If a device supports volume changes, the AUXCAPS_VOLUME flag will be set. If a device supports separate volume changes on the left and right channels, both AUXCAPS_VOLUME and the AUXCAPS_LRVOLUME will be set.

Requirements