请问如何在ＤＥＬＰＨＩ中调用ＥＸＣＥＬ中的函数或宏？

//我已经试验成功的代码: procedure TForm1.Button1Click(Sender: TObject); var   MyWorkBook: _WorkBook;   FileName: string; begin   ExcelApplication1.Connect;   ExcelApplication1.Visible[0] := True;   ExcelApplication1.Caption := ‘应用程序调用 Microsoft Excel‘;   FileName:=‘e:\temp\book1.xls‘; //由于我又时候运行需要一个0,有所时候2个, //如果报参数不匹配的错误,可以删掉或者添加后面0 的个数  MyWorkBook:= ExcelApplication1.Workbooks.Open(FileName, EmptyParam,       EmptyParam, EmptyParam, EmptyParam, EmptyParam, EmptyParam, EmptyParam,       EmptyParam, EmptyParam, EmptyParam, EmptyParam, EmptyParam, 0,0,0);   ExcelWorkbook1.ConnectTo(MyWorkBook);   ExcelWorksheet1.ConnectTo(ExcelWorkbook1.Worksheets[1] as _WorkSheet);  //调用工作簿中已经存在的名称为 My 的宏  ExcelApplication1.Run(‘My‘); end;    加入Servers页的 TExcelApplication    TExcelWorkbook    TExcelWorksheet     像下面这样: unit Unit1; interface uses   Windows, Messages, SysUtils, Variants, Classes,    Graphics, Controls, Forms,   Dialogs, StdCtrls, ExcelXP, OleServer; type   TForm1 = class(TForm)     ExcelApplication1: TExcelApplication;     ExcelWorkbook1: TExcelWorkbook;     ExcelWorksheet1: TExcelWorksheet;     Button1: TButton;     procedure Button1Click(Sender: TObject);   private     { Private declarations }   public     { Public declarations }   end;