MFC LNK2019: 无法解析的外部符号

当你遇到下面问题：

CeventThreadDlg.obj : error LNK2019: 无法解析的外部符号 "public: static unsigned int __cdecl CCeventThreadDlg::WriteY(void *)" (?WriteY@CCeventThreadDlg@@SAIPAX@Z)，该符号在函数 "public: void __thiscall CCeventThreadDlg::OnBnClickedButton1(void)" (?OnBnClickedButton1@CCeventThreadDlg@@QAEXXZ) 中被引用
1>CeventThreadDlg.obj : error LNK2019: 无法解析的外部符号 "public: static unsigned int __cdecl CCeventThreadDlg::WriteS(void *)" (?WriteS@CCeventThreadDlg@@SAIPAX@Z)，该符号在函数 "public: void __thiscall CCeventThreadDlg::OnBnClickedButton1(void)" (?OnBnClickedButton1@CCeventThreadDlg@@QAEXXZ) 中被引用
1>E:\code\MFC\CeventThread\Debug\CeventThread.exe : fatal error LNK1120: 2 个无法解析的外部命令
1>
1>生成失败。

 

来源：MFC 中遇到：无法解析的外部符号 [VC/MFC 进程/线程/DLL]

这个是在XXXDlg.h 声明：

public :
    static  UINT  WriteS( LPVOID  pParam );
    static  UINT  WriteY( LPVOID  pParam);

下面是XXXDlg.cpp实现
声明如下：

static  UINT  WriteS( LPVOID  pParam )
{
    CEdit *cEdit = (CEdit*)pParam;

    for  ( int  i =0; i<10; i++)
    {
        sy_str = "S" ;
        cEdit->SetWindowTextW(_T( "S" ));;

        Sleep(1000);
    }
    WriteSY.SetEvent();
    return  0;
}
static  UINT  WriteY( PVOID  pParam)
{
    CEdit *cEdit = (CEdit*)pParam;

    WaitForSingleObject(WriteSY,INFINITE);

    for  ( int  i =0; i<10; i++)
    {
        sy_str = "Y" ;
        cEdit->SetWindowTextW(_T( "S" ));;

        Sleep(1000);
    }
    WriteSY.SetEvent();
    return  0;
}

我在点击按钮控件，做了创建线程，然后显示：

void  CCeventThreadDlg::OnBnClickedButton1()
{

    // TODO: 在此添加控件通知处理程序代码
    CWinThread *pWriteS=AfxBeginThread(WriteS,
        &C_EditS,
        THREAD_PRIORITY_NORMAL,
        0,
        CREATE_SUSPENDED);
    pWriteS->ResumeThread();
    CWinThread *pWriteY=AfxBeginThread(WriteY,
        &C_EditY,
        THREAD_PRIORITY_NORMAL,
        0,
        CREATE_SUSPENDED);
    pWriteY->ResumeThread();
}