◄Contents► ◄Index► ◄Back► ──────────────────────────────────────────────────────────────────────────── MIDIOUTCAPS The MIDIOUTCAPS structure describes the capabilities of a MIDI output device. typedef struct midioutcaps_tag { WORD wMid; WORD wPid; VERSION vDriverVersion; char szPname[MAXPNAMELEN]; WORD wTechnology; WORD wVoices; WORD wNotes; WORD wChannelMask; DWORD dwSupport; } MIDIOUTCAPS; Fields WORD wMid Specifies a manufacturer ID for the device driver for the MIDI output device. Manufacturer IDs are defined in ◄Manufacturer and Product IDs►. WORD wPid Specifies a product ID for the MIDI output device. Product IDs are defined in ◄Manufacturer and Product IDs►. VERSION vDriverVersion Specifies the version number of the device driver for the MIDI output device. The high-order byte is the major version number, and the low-order byte is the minor version number. The numbering is up to the developer but should change with each driver release. char szPname[MAXPNAMELEN] Specifies the product name in a NULL-terminated string. WORD wTechnology Describes the type of the MIDI output device according to one of the following flags: MOD_MIDIPORT Indicates the device is a MIDI hardware port. MOD_SQSYNTH Indicates the device is a square wave synthesizer. MOD_FMSYNTH Indicates the device is an FM synthesizer. MOD_MAPPER Indicates the device is the Microsoft MIDI Mapper. WORD wVoices Specifies the number of voices supported by an internal synthesizer device. If the device is a port, the field is not meaningful and should be set to 0. WORD wNotes Specifies the maximum number of simultaneous notes that may be played by an internal synthesizer device. If the device is a port, the field is not meaningful and should be set to 0. WORD wChannelMask Specifies the channels that an internal synthesizer device responds to, where the least significant bit refers to channel 0 and the most significant bit to channel 15. Port devices transmit on all channels and so should set this field to 0xFFFF. DWORD dwSupport Specifies optional functionality supported by the device. MIDICAPS_VOLUME Supports volume control. MIDICAPS_LRVOLUME Supports separate left and right volume control. MIDICAPS_CACHE Supports patch caching. Comments If a device supports volume changes, the MIDICAPS_VOLUME flag should be set for the dwSupport field. If a device supports separate volume changes on the left and right channels, both the MIDICAPS_VOLUME and the MIDICAPS_LRVOLUME flags should be set for this field. See also midiOutGetDevCaps -♦-