| DirectX SDK | 
The DMUS_OFFSETTABLE structure is used in the header of DLS instrument data being downloaded to a port.
typedef struct _DMUS_OFFSETTABLE {
    ULONG ulOffsetTable[DMUS_DEFAULT_SIZE_OFFSETTABLE];
} DMUS_OFFSETTABLE;
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dmdls.h.