本人用delphi编写了一个dll,源如下 library GoodHelper11; uses SysUtils, Dialogs, Classes; {$R *.res} function Add(a,b: double; out c:double):double; stdcall; begin c := Abs(a)+Abs(b); Result := a+b; end; exports Add; begin end. mq4中申明如下 #import "GoodHelper11.dll" double Add(double a, double b,...