c++编译错误，语法错误: 标识符“LPCONTEXT”

#include "StdAfx.h"
#include "string"
#include
#include "iostream"
#include
#include

using namespace::std;

BOOL main()
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
ZeroMemory(&si,sizeof(si));
si.cb=sizeof(si);
ZeroMemory(&pi,sizeof(pi));
string myline="D:\\Program Files\\AnsysInc\\v121\\ANSYS\\bin\\intel\\ansys121.exe-b-pdyna-input.txt-ofile.out";
LPTSTR myline2=LPTSTR(&myline);
BOOL fRet=CreateProcess(NULL,myline2,NULL,NULL,FALSE,NORMAL_PRIORITY_CLASS|CREATE_NEW_CONSOLE,NULL,NULL,&si,&pi);
return fRet;
}

#include "string"
#include "iostream"
#include

using namespace::std;
不就行了么

额