错误提示：unresolved external symbol __endthreadex

第一个MFC应用程序创建简单的Hello窗口遇到的问题。

错误代码：

//Hello.h

class CMyApp : public CWinApp

{

public:

virtual BOOL InitInstance();

};

class CMainWindow : public CFrameWnd

{

public:

CMainWindow();

protected:

afx_msg void OnPaint();

DECLARE_MESSAGE_MAP();

};

//Hello.cpp

#include <afxwin.h>

#include "Hello.h"

CMyApp myApp;

//CMyApp member fuctions

BOOL CMyApp::InitInstance()

{

m_pMainWnd = new CMainWindow;

m_pMainWnd ->ShowWindow(m_nCmdShow);

m_pMainWnd ->UpdateWindow();

return TRUE;

}

BEGIN_MESSAGE_MAP(CMainWindow, CFrameWnd)

ON_WM_PAINT()

END_MESSAGE_MAP

CMainWindow::CMainWindow()

{

Create(NULL, _T("The Hello Application"));

}

void CMainWindow::OnPaint()

{

CPaintDC dc (this);

CRect rect;

GetClientRect(&rect);

dc.DrawText(_T("Hello,MFC"), -1, &rect, DT_SINGLELINE|DT_CENTER|DT_VCENTER);

}

改正后的代码：

//Hello.h

class CMyApp : public CWinApp

{

public:

virtual BOOL InitInstance();

};

class CMainWindow : public CFrameWnd

{

public:

CMainWindow();

protected:

afx_msg void OnPaint();

DECLARE_MESSAGE_MAP() //此处不可以加";"分号很多时候都容易忘记而习惯地加上了";"

};

//Hello.cpp

#include <afxwin.h>

#include "Hello.h"

CMyApp myApp;

//CMyApp member fuctions

BOOL CMyApp::InitInstance()

{

m_pMainWnd = new CMainWindow;

m_pMainWnd ->ShowWindow(m_nCmdShow);

m_pMainWnd ->UpdateWindow();

return TRUE;

}

BEGIN_MESSAGE_MAP(CMainWindow, CFrameWnd)

ON_WM_PAINT()

END_MESSAGE_MAP //此处忘记加()

CMainWindow::CMainWindow()

{

Create(NULL, _T("The Hello Application"));

}

void CMainWindow::OnPaint()

{

CPaintDC dc (this);

CRect rect;

GetClientRect(&rect);

dc.DrawText(_T("Hello,MFC"), -1, &rect, DT_SINGLELINE|DT_CENTER|DT_VCENTER);

}

运行后仍提示的错误：

inking...

nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __endthreadex

nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __beginthreadex

Debug/Hello.exe : fatal error LNK1120: 2 unresolved externals

Error executing link.exe.Hello.exe - 3 error(s), 0 warning(s)

解决方法：将工程设置为Using MFC in a static library

编译运行结果：

如上错误主要是因为MFC类库没有引用所出现的问题。

具体解决方法：选择Project 然后选择Setings再选择General 在Microsoft foundation Classes 下拉列表中有三个选项：1.Not using MFC 2. Use MFC in a Static Libray 3. Use MFC in a Shared DLL 这里选择第2个就可以了。