为什么加了一个对话框就报错

[顾小白xx]

#include "stdafx.h"
#include "MFCProject.h"

#include "Mruku.h"
#include "MyDialog2.h"
#include "MyDialog.h"
#include "MFCProjectDoc.h"
#include "MFCProjectView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMFCProjectView

IMPLEMENT_DYNCREATE(CMFCProjectView, CView)

BEGIN_MESSAGE_MAP(CMFCProjectView, CView)
//{{AFX_MSG_MAP(CMFCProjectView)
ON_COMMAND(ID_RUKU, OnRuku)
ON_COMMAND(ID_dengji, Ondengji)
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMFCProjectView construction/destruction

CMFCProjectView::CMFCProjectView()
{
// TODO: add construction code here

}

CMFCProjectView::~CMFCProjectView()
{
}

BOOL CMFCProjectView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs

return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMFCProjectView drawing

void CMFCProjectView::OnDraw(CDC* pDC)
{
CMFCProjectDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CMFCProjectView printing

BOOL CMFCProjectView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}

void CMFCProjectView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}

void CMFCProjectView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CMFCProjectView diagnostics

#ifdef _DEBUG
void CMFCProjectView::AssertValid() const
{
CView::AssertValid();
}

void CMFCProjectView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}

CMFCProjectDoc* CMFCProjectView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMFCProjectDoc)));
return (CMFCProjectDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMFCProjectView message handlers

void CMFCProjectView::OnRuku()
{
AfxMessageBox("点击了登录");
//pMyruku=new CMruku;
// pMyruku->Create(CMruku::IDD);
//pMyruku->ShowWindow(SW_SHOW);
// TODO: Add your command handler code here

}

void CMFCProjectView::Ondengji()
{
pMdialog=new CMyDialog;
pMdialog->Create(CMyDialog::IDD);
pMdialog->ShowWindow(SW_SHOW);
// TODO: Add your command handler code here
}
//这是实现文件
#if !defined(AFX_MFCPROJECTVIEW_H__7E4D6851_7C15_4862_BB65_2B9EF8782EB4__INCLUDED_)
#define AFX_MFCPROJECTVIEW_H__7E4D6851_7C15_4862_BB65_2B9EF8782EB4__INCLUDED_

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


class CMFCProjectView : public CView
{
protected: // create from serialization only
CMFCProjectView();
DECLARE_DYNCREATE(CMFCProjectView)

// Attributes
public:
CMFCProjectDoc* GetDocument();
//public:
// CMruku* pMyruku;
public:
CMyDialog*pMdialog;
//public:
//CMyDialog2*pMdialog2;

// Operations
public:

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CMFCProjectView)
public:
virtual void OnDraw(CDC* pDC); // overridden to draw this view
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
protected:
virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
//}}AFX_VIRTUAL

// Implementation
public:
virtual ~CMFCProjectView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
//{{AFX_MSG(CMFCProjectView)
afx_msg void OnRuku();
afx_msg void Ondengji();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG // debug version in MFCProjectView.cpp
inline CMFCProjectDoc* CMFCProjectView::GetDocument()
{ return (CMFCProjectDoc*)m_pDocument; }
#endif

/////////////////////////////////////////////////////////////////////////////

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

#endif // !defined(AFX_MFCPROJECTVIEW_H__7E4D6851_7C15_4862_BB65_2B9EF8782EB4__INCLUDED_)
这是头文件
#if !defined(AFX_MFCPROJECTVIEW_H__7E4D6851_7C15_4862_BB65_2B9EF8782EB4__INCLUDED_)
#define AFX_MFCPROJECTVIEW_H__7E4D6851_7C15_4862_BB65_2B9EF8782EB4__INCLUDED_

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


class CMFCProjectView : public CView
{
protected: // create from serialization only
CMFCProjectView();
DECLARE_DYNCREATE(CMFCProjectView)

// Attributes
public:
CMFCProjectDoc* GetDocument();
//public:
// CMruku* pMyruku;
public:
CMyDialog*pMdialog;
//public:
//CMyDialog2*pMdialog2;

// Operations
public:

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CMFCProjectView)
public:
virtual void OnDraw(CDC* pDC); // overridden to draw this view
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
protected:
virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
//}}AFX_VIRTUAL

// Implementation
public:
virtual ~CMFCProjectView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
//{{AFX_MSG(CMFCProjectView)
afx_msg void OnRuku();
afx_msg void Ondengji();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG // debug version in MFCProjectView.cpp
inline CMFCProjectDoc* CMFCProjectView::GetDocument()
{ return (CMFCProjectDoc*)m_pDocument; }
#endif

/////////////////////////////////////////////////////////////////////////////

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

#endif // !defined(AFX_MFCPROJECTVIEW_H__7E4D6851_7C15_4862_BB65_2B9EF8782EB4__INCLUDED_)
这是报错的信息
我之前写的以个就能行没问题，写了第二个就不行了每次都重新写，，我都要疯了这是什么问题啊。