5.3 ODEV Messages and Their Parameters

All ODEV messages, including OPlay and OClear, have their parameters passed in a parameter block pointed to by the msgData PSYX parameter. There is a parameter block type for each message declared in "PSYXs.h". Each type name is specified as <messagename>Params. There is also a union of all the types declared as ODEVparams. The union type allows the ODEV to declare main as

	short main(long msg, short mod, ODEVparams *msgData, long id);