我用下面的这段脚本写变量值到EXCEL中，怎么弹出这样的对话框“当前位置发现已经存在名为"d:xxx.xls"的文件，你希望将该文件替换掉吗”，这个脚本的哪个地方需要修改一下？先谢谢了！

#pragma code ("kernel32.dll")

VOID GetLocalTime(LPSYSTEMTIME lpSystemTime);

#pragma code ()

static int i=1;

char FileName[20] = " ";

SYSTEMTIME sysTime;

__object* pExcel = NULL;

GetLocalTime(&sysTime);

sprintf(FileName,"d:\\%d-%d-%d.xls",sysTime.wYear,sysTime.wMonth,sysTime.wDay);

pExcel = __object_create("Excel.Application.12");

pExcel->Visible = 0;

pExcel->Workbooks ->Open ("d:\\Book1.xls");

i++;

pExcel->WorkSheets("sheet1")->Cells(i,1)->Value=10;

pExcel->WorkSheets("sheet1")->Cells(i,2)->Value=20;

pExcel->WorkSheets("sheet1")->Cells(i,3)->Value=30;

pExcel->ActiveWorkbook->SaveAs(FileName);

pExcel->Workbooks->Close();

pExcel->Quit();

__object_delete(pExcel);