Int 21 Fn 5FCC  - Lantastic V4.1+ - Get/set Server Control Bits            [N]

   AX = 5FCCh
   ES:DI -> ASCIZ server name in form "\\machine"
   CX = bit values (value of bits you want to set) (see #1434)
   DX = bit mask (bits you are interested in, 0 = get only) (see #1434)

Return: CF clear if successful
       CX = control bits after call (see #1434)
   CF set on error
       AX = error code

Note:  you must have the "S" privilege to SET, anyone can GET.

Bitfields for control bits:
Bit(s) Description (Table 1434)
 0 disable logins