# MX\_INFDEF > [HTML Version](mx_infdef.htm) **xcall MIAMEX, MX\_INFDEF, opcode, defcodes** MX\_INFDEF (MIAMEX 143) Retrieves or sets the INFLD default TYPE codes. These may be initially set by the SBR=INFDEF statement in miame.ini, and may also be updated or queried by the SET INFDEF command. **Parameters** _opcode_ ([Num](num.htm.md)) \[in\] 0 (mxop\_get) to retrieve the current SBR=INFDEF: codes into _defcodes_, and 1 (mxop\_set) to make the contents of _defcodes_ be the new default INFLD codes. _defcodes_ ([String](string.htm.md)) \[in\] receives or supplies default INFLD TYPE codes, based on opcode.