错误提示如下
d:\chongdianshuaka\chongdianshuaka\chongdianshuakadlg.h(27) : error C2065: 'IDD_Chongdianshuaka_DIALOG' : undeclared identifier
d:\chongdianshuaka\chongdianshuaka\chongdianshuakadlg.h(27) : error C2057: expected constant expression
执行 cl.exe 时出错.
出错语句已经改颜色
源代码如下：
// ChongdianshuakaDlg.h : header file
//

#if !defined(AFX_ChongdianshuakaDLG_H__A0839107_B418_11D6_A0F0_00E01808B099__INCLUDED_)
#define AFX_ChongdianshuakaDLG_H__A0839107_B418_11D6_A0F0_00E01808B099__INCLUDED_

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

/////////////////////////////////////////////////////////////////////////////
// CChongdianshuakaDlg dialog


class CChongdianshuakaDlg : public CDialog
{
public:
    long m_baund;
    HANDLE icdev;
public:
// Construction
public:
    CChongdianshuakaDlg(CWnd* pParent = NULL);    // standard constructor
    long GetBaund();
// Dialog Data
    //{{AFX_DATA(CChongdianshuakaDlg)
    enum { IDD = IDD_Chongdianshuaka_DIALOG };
    CComboBox    m_KeyModeCtrl;
    CStatic    m_Status;
    CComboBox    m_BaundCtl;
    int        m_Port;
    int        m_Sector;
    CString    m_key;
    int        m_OpMode;
    CString    m_Data;
    //}}AFX_DATA

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

// Implementation
protected:
    HICON m_hIcon;

    // Generated message map functions
    //{{AFX_MSG(CChongdianshuakaDlg)
    virtual BOOL OnInitDialog();
    afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
    afx_msg void OnPaint();
    afx_msg HCURSOR OnQueryDragIcon();
    afx_msg void OnBtnConnect();
    afx_msg void OnBtnDisconnect();
    afx_msg void OnTest();
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()
};

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

#endif // !defined(AFX_ChongdianshuakaDLG_H__A0839107_B418_11D6_A0F0_00E01808B099__INCLUDED_)

你看看resource.h文件里面有IDD_Chongdianshuaka_DIALOG的定义么，这个错误貌似是这里没有定义。

重建一下

有个菜单项是全部重建，你试试