Int 15 Fn DE12  - Desqview V2.01+ - "cstyle" - Set "c"-compatible Control  [Q]

   AX = DE12h
   BX = 0000h    select normal style (linefeed only moves down)
        nonzero  select C style (linefeed moves to start of next line)

Return: nothing

Note:  set on a per-task basis, and inherited from the parent task