The DMUS_IO_VERSION structure contains the version number of the data. It is used in the version subchunk of various chunks. See Common Chunks.
typedef struct _DMUS_IO_VERSION {
DWORD dwVersionMS;
DWORD dwVersionLS;
} DMUS_IO_VERSION;
Windows NT/2000: Requires Windows 2000.
Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
Header: Declared in dmusicf.h.