NAME
    CreateExtIO -- create an IORequest structure
SYNOPSIS
    ioReq = CreateExtIO(port,ioSize);
    struct IORequest *CreateExtIO(struct MsgPort *, ULONG);
FUNCTION
    Allocates memory for and initializes a new IO request block
    of a user-specified number of bytes. The number of bytes
    MUST be the size of a legal IORequest (or extended IORequest)
    or very nasty things will happen.
INPUTS
    port - an already initialized message port to be used for this IO
           request's reply port. If this is NULL this function fails.
    ioSize - the size of the IO request to be created.
RESULT
    ioReq - a new IO Request block, or NULL if there was not enough memory
EXAMPLE
    if (ioReq = CreateExtIO(CreatePort(NULL,0),sizeof(struct IOExtTD)))
SEE ALSO
    DeleteExtIO(), CreatePort(), exec.library/CreateMsgPort()