# MX\_DYNFUNC > [HTML Version](mx_dynfunc.htm) _Added October 2018_ **xcall MIAMEX, MX\_DYNFUNC, op, funcname, status, type, size** MX\_DYNFUNC (MIAMEX 193) is used for DYNFUNC-related utilities. **Parameters** _opcode_ ([Num](num.htm.md)) \[in\] Only one opcode, 1, is supported. It returns existence, type, and size info for the specified dynamic function. _funcname_ ([String](string.htm.md)) \[in\] Name of the function to inquire about. Case sensitive. Must be tagged with the Dynamic keyword for it to be visible. _status_ (Signed [Num](num.htm.md)) \[out\] Returns 1 if found, 0 if not found, <0 for errors _type_ ([String](string.htm.md)) \[out\] Returns the type of the function, which could be an internal type—e.g. "B", "S", "X", "F", or "I"—or a DEFSTRUCT type. _size_ ([Num](num.htm.md)) \[out\] Returns the length in bytes of the function's return value. **Also See** • [Dynamic Functions](dynamicfunctions.htm.md) **History** 2018 September, A-Shell 6.5.1647: Routine added to A-Shell.