[请教]error C2065: 'bOpen' : undeclared identifier

[dongjichonger]

我在做控件MSComm串口编程时提示如下错误：error C2065: 'bOpen' : undeclared identifier，望大家指点一下，谢谢喽！
头文件：
// ModemCommDlg.h : header file
//
//{{AFX_INCLUDES()
#include "mscomm.h"
//}}AFX_INCLUDES

#if !defined(AFX_MODEMCOMMDLG_H__11E6444C_1474_4CD5_BB8F_CCD290E46A04__INCLUDED_)
#define AFX_MODEMCOMMDLG_H__11E6444C_1474_4CD5_BB8F_CCD290E46A04__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

/////////////////////////////////////////////////////////////////////////////
// CModemCommDlg dialog

class CModemCommDlg : public CDialog
{
// Construction
public:
void OpenComm(int number);
void SendString(CString m_strEditSend);
CModemCommDlg(CWnd* pParent = NULL); // standard constructor

// Dialog Data
//{{AFX_DATA(CModemCommDlg)
enum { IDD = IDD_MODEMCOMM_DIALOG };
CButton m_ctrlDial;
CString m_strEditReceive;
CString m_strEditSend;
CString m_strEditTelNo;
CMSComm m_ctrlComm;
int m_NumCom;
//}}AFX_DATA

// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CModemCommDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL

// Implementation
protected:
HICON m_hIcon;

// Generated message map functions
//{{AFX_MSG(CModemCommDlg)
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
afx_msg void OnComm();
afx_msg void OnRadioCom1();
afx_msg void OnRadioCom2();
afx_msg void OnDial();
afx_msg void OnSend();
afx_msg void OnDoubleclickedRadioCom1();
DECLARE_EVENTSINK_MAP()
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_MODEMCOMMDLG_H__11E6444C_1474_4CD5_BB8F_CCD290E46A04__INCLUDED_)


CPP文件：
// ModemCommDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ModemComm.h"
#include "ModemCommDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
CAboutDlg();

// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA

// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL

// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CModemCommDlg dialog

CModemCommDlg::CModemCommDlg(CWnd* pParent /*=NULL*/)
: CDialog(CModemCommDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CModemCommDlg)
m_strEditReceive = _T("");
m_strEditSend = _T("");
m_strEditTelNo = _T("");
m_NumCom = -1;
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CModemCommDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CModemCommDlg)
DDX_Control(pDX, IDC_BUTTON_DIAL, m_ctrlDial);
DDX_Text(pDX, IDC_EDIT_RECEIVE, m_strEditReceive);
DDX_Text(pDX, IDC_EDIT_SEND, m_strEditSend);
DDX_Text(pDX, IDC_EDIT_TELNO, m_strEditTelNo);
DDX_Control(pDX, IDC_MSCOMM1, m_ctrlComm);
DDX_Radio(pDX, IDC_RADIO_COM1, m_NumCom);
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CModemCommDlg, CDialog)
//{{AFX_MSG_MAP(CModemCommDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_RADIO_COM1, OnRadioCom1)
ON_BN_CLICKED(IDC_RADIO_COM2, OnRadioCom2)
ON_BN_CLICKED(IDC_BUTTON_DIAL, OnDial)
ON_BN_CLICKED(IDC_BUTTON_SEND, OnSend)
ON_BN_DOUBLECLICKED(IDC_RADIO_COM1, OnDoubleclickedRadioCom1)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CModemCommDlg message handlers

BOOL CModemCommDlg::OnInitDialog()
{
CDialog::OnInitDialog();

// Add "About..." menu item to system menu.

// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);

CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}

// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon

// TODO: Add extra initialization here

DWORD style=WS_VISIBLE|WS_CHILD;
if(!m_ctrlComm.Create(NULL,style,CRect(0,0,0,0),this,IDC_MSCOMM1))
{
TRACE0("Failed to create OLE Communications Control\n");
return -1; //fail to create
}

m_ctrlComm.SetCommPort(7);
m_ctrlComm.SetInBufferSize(1024);
m_ctrlComm.SetOutBufferSize(524);

if(!m_ctrlComm.GetPortOpen())
{
m_ctrlComm.SetPortOpen(TRUE);
SendString("ATS0=1\n"); //Modem自动等待连接
}
else
AfxMessageBox("串口7已被占用，请选择其他串口");

return TRUE; // return TRUE unless you set the focus to a control
}

void CModemCommDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}

// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.

void CModemCommDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting

SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;

// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}

// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CModemCommDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}

BEGIN_EVENTSINK_MAP(CModemCommDlg, CDialog)
//{{AFX_EVENTSINK_MAP(CModemCommDlg)
ON_EVENT(CModemCommDlg, IDC_MSCOMM1, 1 /* OnComm */, OnComm, VTS_NONE)
//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()

void CModemCommDlg::OnComm()
{
// TODO: Add your control notification handler code here
VARIANT vResponse;
char *str;
char *str1;
int k,nEvent,i;

nEvent=m_ctrlComm.GetCommEvent();

switch(nEvent)
{
case 2: //收到大于RTHresshold个字符
k=m_ctrlComm.GetInBufferCount(); //接收到的字符数目

if(k>0)
{
vResponse=m_ctrlComm.GetInput(); //read
//对数据进行处理
str=(char*)(unsigned char*)vResponse.parray->pvData;
}
//接收到字符，MSComm控件发送事件
i=0;
str1=str;
while(i<k)
{
i++;
str1++;
}
*str1='\0';
m_strEditReceive+=(const char *)str;
//清除字符串中的不必要字符
break;
case 3: //CTS线状态发生了变化
break;
case 4: //DSR线状态发生了变化
break;
case 5: //CD线状态发生了变化
break;
case 6: //Ring Indicator 发生变化
break;
}

UpdateData(FALSE);
}

void CModemCommDlg::OnRadioCom1()
{
// TODO: Add your control notification handler code here
OpenComm(1);
}

void CModemCommDlg::OnRadioCom2()
{
// TODO: Add your control notification handler code here
OpenComm(2);
}

void CModemCommDlg::OnDial() //鼠标单击“拨号”按钮事件的响应处理函数
{
// TODO: Add your control notification handler code here
CString strTemp;
int Count=m_strEditTelNo.GetLength();
if(!bOpen)
{
if(Count<7)
AfxMessageBox("电话号码位数错误");
else
{
bOpen=TRUE;

//向Modem发送指令
strTemp="ATDT"+m_strEditTelNo+"\n";
SendString(strTemp);
m_ctrlDial.SetWindowText("挂断");
}
}
else
{
SendString("ATH0");
bOpen=FALSE;
m_ctrlDial.SetWindowText("拨号");
}
}

void CModemCommDlg::OnSend() //“发送”按钮的响应函数
{
// TODO: Add your control notification handler code here
CString strTemp=m_strEditReceive;
SendString(strTemp);

}



void CModemCommDlg::SendString(CString m_strSend) //字符发送函数
{
char TxData[100];
int Count=m_strEditSend.GetLength();

for(int i=0;i<Count;i++)
TxData[i]=m_strEditSend.GetAt(i);

CByteArray array;
array.RemoveAll();
array.SetSize(Count);

for(i=0;i<Count;i++)
array.SetAt(i,TxData[i]);
m_ctrlComm.SetOutput(COleVariant(array));
}


void CModemCommDlg::OpenComm(int number) //选择并打开串口
{
m_ctrlComm.SetCommPort(number); //选择COM

if(!m_ctrlComm.GetPortOpen()) //打开串口
{
m_ctrlComm.SetPortOpen(TRUE); //Modem 自动等待连接
SendString("ATS0=1\n");

bOpen=FALSE;
m_ctrlDial.SetWindowText("拨号");
}
else
AfxMessageBox("串口7已被占用，请选择其他串口");

}
结果显示：Compiling...
ModemCommDlg.cpp
D:\lianxi\vc++\ModemComm\ModemCommDlg.cpp(274) : error C2065: 'bOpen' : undeclared identifier
执行 cl.exe 时出错.

[evencoming]

void CModemCommDlg::OnDial() //鼠标单击“拨号”按钮事件的响应处理函数
{
// TODO: Add your control notification handler code here
CString strTemp;
int Count=m_strEditTelNo.GetLength();
if(!bOpen) // 这里使用的bOpen没定义。你类中也没定义，也没局部定义。肯定悲剧啊
{

[dongjichonger]

恩，就是这个不知怎么去定义才问的，我是参考书上写的程序，看到这个错误，不知这个是函数里自带的而我写错了，还是需要定义没定义，另外，我也不知如何去定义，用为我是新手，所以这些都不太懂

[evencoming]

[Quote=引用 2 楼 的回复:]

恩，就是这个不知怎么去定义才问的，我是参考书上写的程序，看到这个错误，不知这个是函数里自带的而我写错了，还是需要定义没定义，另外，我也不知如何去定义，用为我是新手，所以这些都不太懂
[/Quote]
只能对你说:仔细看书,从头开始.

[dongjichonger]

哦，这个书上真没有