DirectX 9.0 Summer 2004 SDK和VC++6.0编程时总是出现问题，怎么办？？？

Question

#define DIRECTINPUT_VERSION 0x0800 //声明DirectX Input的版本是8.0
#ifndef _WIN32_DCOM
#define _WIN32_DCOM
#endif
#define pr printf

#pragma once
#define INITGUID //确保INITGUID已被定义
#define INTERFACE IDirectInput8A
#include
#include
#include
#include

#pragma comment(lib,"dxguid.lib")
#pragma comment(lib,"DxErr9.lib")
#pragma comment(lib,"dinput8.lib")

int main()
{
HRESULT hresult;

LPDIRECTINPUT8 lpdi; //DirectInput接口对象指针
LPDIRECTINPUTDEVICE8 Joystick=NULL; //定义指向游戏操纵杆的指针

//创建DirectInput接口对象
hresult=DirectInput8Create(
GetModuleHandle(NULL), //应用程序句柄
DIRECTINPUT_VERSION, //DirectInput版本号
&IID_IDirectInput8, //强制类型转换，否则该参数不匹配(#define REFIID const struct GUID const)即一个指向一个常量的指针常量 &
(VOID*)&lpdi,

NULL);

if(hresult!=DI_OK)
{pr("创建DirectInput对象失败!\n"); return 1;}
else
pr("创建DirectInput对象成功!\n");

//创建DirectInput设备,
hresult=lpdi->CreateDevice(GUID_Joystick,&Joystick,NULL);
}

e:\chengxushili\手柄按钮\shoubing\caozonggan.c(48) : error C2039: 'CreateDevice' : is not a member of 'IDirectInput8A'
d:\program files\microsoft directx sdk 9.0\include\dinput.h(2625) : see declaration of 'IDirectInput8A'
Error executing cl.exe.

CaoZongGan.obj - 1 error(s), 0 warning(s)

请问大牛们这个程序该怎么修改啊？我这刚开始就出现了错误，纠结中！~~~~~~~
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