Structures

This section contains reference information for the following run-time structures used in DirectMusic:

• DMUS_BUFFERDESC
• DMUS_CHORD_KEY
• DMUS_CHORD_PARAM
• DMUS_CLOCKINFO
• DMUS_COMMAND_PARAM
• DMUS_COMMAND_PARAM2
• DMUS_EVENTHEADER
• DMUS_MUTE_PARAM
• DMUS_NOTERANGE
• DMUS_OBJECTDESC
• DMUS_PORTCAPS
• DMUS_PORTPARAMS
• DMUS_RHYTHM_PARAM
• DMUS_SUBCHORD
• DMUS_SYNTHSTATS
• DMUS_TEMPO_PARAM
• DMUS_TIMESIGNATURE
• DMUS_VERSION
• DMUS_WAVES_REVERB_PARAMS
• KSPROPERTY

Special categories of structures are contained in the following sections:

• Messages
• File Structures
• DLS Structures

Note  The memory for all DirectX structures must be initialized to 0 before use. In addition, all structures that contain a dwSize member must set the member to the size of the structure, in bytes, before use. The following DirectDraw example performs these tasks on a common structure, DDCAPS:

DDCAPS ddcaps; // Can't use this yet.
 
ZeroMemory(&ddcaps, sizeof(ddcaps));
ddcaps.dwSize = sizeof(ddcaps);
 
// Now the structure can be used.
.
.