INT 31H 0102H: Resize DOS Memory Block

                                                    Compatibility: DPMI 1.0+ 
 Expects: AX    0102H
          BX    desired new block size, in 16-byte paragraphs
          DX    base selector of selector block to free
 Returns: CF    NC (clear) if successful
                else AX = DPMI Error Code
                     BX = size of largest available block, in 16-byte pares
    Info: Changes the size of a memory block allocated via INT 31H 0100H
          (allocate DOS memory block).

          Grow requests may fail when DOS memory is fragmented or when
          there are no contiguous LDT entries available.

    Note: You must not modify the LDT descriptor entry(s) represented by
          these DOS-block selectors.  Use INT 31H 0101H to deallocate.

See Also: DPMI API
          INT 2fH: Multiplex Interrupt
          DOS Functions