Int 2F Fn 118A  - Lan Manager 2.0+ Dos Enhanced Encrypt.exe - Stream Encr  [N]

   AX = 118Ah
   BX = function (0000h or 0001h)

Return: CF clear if successful
       AX = 1100h success
   CF set if error
       AX = 0001h, etc.

See Also: AX=1186h,AH=41h,AH=42h,AH=4Bh