VioGetBuf

#define INCL_VIO

USHORT  rc = VioGetBuf(LVBPtr, Length, VioHandle);

PULONG           LVBPtr;        /* Points to LVB */
PUSHORT          Length;        /* Length of buffer */
HVIO             VioHandle;     /* Vio handle */

USHORT           rc;            /* return code */