DosWriteAsync

#define INCL_DOSFILEMGR

USHORT  rc = DosWriteAsync(FileHandle, RamSemaphore, ReturnCode,
                             BufferArea, BufferLength, BytesWritten);

HFILE            FileHandle;    /* File handle */
PULONG           RamSemaphore;  /* RAM semaphore */
PUSHORT          ReturnCode;    /* I/O operation return code (returned) */
PVOID            BufferArea;    /* User buffer */
USHORT           BufferLength;  /* Buffer length */
PUSHORT          BytesWritten;  /* Bytes written (returned) */

USHORT           rc;            /* return code */