Int 21 Fn 4303  - Dr-dos 3.41+ Internal - Set Access Rights And Password   [O]

   AX = 4303h
   CX = access rights
        bits 11-0: access rights (see AX=4302h)
        bit 15: new password is to be set
   DS:DX -> ASCIZ pathname
   [DTA] = new password if CX bit 15 is set (blank-padded to 8 characters)

Return: CF clear if successful
   CF set on error
       AX = error code

Notes: if the file is already protected, the old password must be added after
     the pathname, separated by a ";"
   this function is documented in DR-DOS 6.0 and corresponds to the
     "Get/Set File Attributes" function, subfunction 3, documented in
     Concurrent DOS.

See Also: AH=0Fh,AH=17h,AX=4302h,AX=4305h,AX=4454h