在学习中遇到一个问题,请大家帮忙看看,谢谢高分求救
#ifndef __INPUT_SYSTEM_INCLUDED__
#define __INPUT_SYSTEM_INCLUDED__

#include <dinput.h>

#define IS_USEKEYBOARD 1
#define IS_USEMOUSE 2
#define IS_USEJOYSTICK 4

class CKeyboard
{


public:
CKeyboard(LPDIRECTINPUT8 pDI, HWND hwnd);//错误通不过
~CKeyboard();

bool KeyDown(int key) { return (m_keys[key] & 0x80) ? true : false; }
bool KeyUp(int key) { return (m_keys[key] & 0x80) ? false : true; }

bool Update();

void Clear() { ZeroMemory(m_keys, 256 * sizeof(char)); }

bool Acquire();
bool Unacquire();
private:
LPDIRECTINPUTDEVICE8 m_pDIDev;//错误

char m_keys[256];

};


class CMouse
{
public:
CMouse(LPDIRECTINPUT8 pDI, HWND hwnd, bool isExclusive = true);//错误
~CMouse();

bool ButtonDown(int button) { return (m_state.rgbButtons[button] & 0x80) ? true : false; }
bool ButtonUp(int button) { return (m_state.rgbButtons[button] & 0x80) ? false : true; }
void GetMovement(int &dx, int &dy) { dx = m_state.lX; dy = m_state.lY; }

bool Update();

bool Acquire();
bool Unacquire();

private:
LPDIRECTINPUTDEVICE8 m_pDIDev;//错误
DIMOUSESTATE m_state;
};


class CJoystick
{
public:
CJoystick(LPDIRECTINPUT8 pDI, HINSTANCE appInstance);//错误
~CJoystick();

bool Update();

bool Acquire();
bool Unacquire();

private:
LPDIRECTINPUTDEVICE8 m_pDIDev;//错误
};


class CInputSystem
{
public:
CInputSystem() { }
~CInputSystem() { Shutdown(); }
bool Initialize(HWND hwnd, HINSTANCE appInstance, bool isExclusive, DWORD flags = 0);
bool Shutdown();

void AcquireAll();
void UnacquireAll();

CKeyboard *GetKeyboard() { return m_pKeyboard; }
CMouse *GetMouse() { return m_pMouse; }
CJoystick *GetJoystick() { return m_pJoystick; }

bool Update();

bool KeyDown(int key) { return (m_pKeyboard && m_pKeyboard-> KeyDown(key)); }
bool KeyUp(int key) { return (m_pKeyboard && m_pKeyboard-> KeyUp(key)); }

bool ButtonDown(int button) { return (m_pMouse && m_pMouse-> ButtonDown(button)); }
bool ButtonUp(int button) { return (m_pMouse && m_pMouse-> ButtonUp(button)); }
void GetMouseMovement(int &dx, int &dy) { if (m_pMouse) m_pMouse-> GetMovement(dx, dy); }

private:
CKeyboard *m_pKeyboard;
CMouse *m_pMouse;
CJoystick *m_pJoystick;

LPDIRECTINPUT8 m_pDI;//错误
};
请大家帮忙看看,错误的地方,怎么修改?非常感谢.


[解决办法]
头文件没加进来
[解决办法]
找到LPDIRECTINPUT8是在哪定义的
[解决办法]
Find 总会有个定义的
[解决办法]
你安装了Direct X SDK吗？如果是VC 6，默认带的是DX 5的，需要自己另外安装。
[解决办法]
把directx的include目录添加到vc的include路径了吗？