我用的是vc++6.0,这个工程是一个主窗口，通过一个控件调用一个叫IDD_ADD窗口，在IDD_ADD窗口中我创建了类CAddDialog，编译的时候IDD_ADD窗口代码里面报错，错误信息如下：
d:\学习\vc++\lhwy\adddialog.h(21) : error C2065: 'IDD_ADD' : undeclared identifier
d:\学习\vc++\lhwy\adddialog.h(21) : error C2057: expected constant expression
lhwy.cpp
d:\学习\vc++\lhwy\adddialog.h(21) : error C2065: 'IDD_ADD' : undeclared identifier
d:\学习\vc++\lhwy\adddialog.h(21) : error C2057: expected constant expression
lhwyDoc.cpp
d:\学习\vc++\lhwy\adddialog.h(21) : error C2065: 'IDD_ADD' : undeclared identifier
d:\学习\vc++\lhwy\adddialog.h(21) : error C2057: expected constant expression
lhwySet.cpp
d:\学习\vc++\lhwy\adddialog.h(21) : error C2065: 'IDD_ADD' : undeclared identifier
d:\学习\vc++\lhwy\adddialog.h(21) : error C2057: expected constant expression
lhwyView.cpp
d:\学习\vc++\lhwy\adddialog.h(21) : error C2065: 'IDD_ADD' : undeclared identifier
d:\学习\vc++\lhwy\adddialog.h(21) : error C2057: expected constant expression

错误信息指向代码：
public:
CAddDialog(CWnd* pParent = NULL); // standard constructor

// Dialog Data
//{{AFX_DATA(CAddDialog)
enum { IDD = IDD_ADD };报错行
CButton m_Ok;
CButton m_Cancel;
long m_English;
long m_Maths;
CString m_strName;
long m_Xuehao;
//}}AFX_DATA

到底是什么地方出错？我用的是MFC向导。请教，静候佳音！

[此贴子已经被作者于2006-3-30 15:05:05编辑过]