创建线程，执行线程函数调用类的问题？

Question

class CBoardPort  
{
public:
CBoardPort();
virtual ~CBoardPort();
protected:
        CWinThread *m_pProtThread;
        static UINT CBoardPort::LoopProtThread(LPVOID lParam);
        void SetIoOutState(void);
        void GetIOInState(void);
        void SetDAOutState(void); 
};/////////////////////////////
        LPVOID      pParam = NULL;
        int         nPriority = THREAD_PRIORITY_ABOVE_NORMAL;  
        UINT        nStackSize = 0;                           
        DWORD       dwCreateFlags = 0;                        
        LPSECURITY_ATTRIBUTES lpSecurityAttrs = NULL ;        
        m_pProtThread =AfxBeginThread(CBoardPort::LoopProtThread,pParam,nPriority , nStackSize, dwCreateFlags , lpSecurityAttrs);
//////////////////
UINT CBoardPort::LoopProtThread(LPVOID lParam)
{
        while(1)
        {
                SetDAOutState();
                GetIOInState();
                SetIoOutState();
                Sleep(0);                                //暂时将线程时间交给其他线程(必须的)
}        
        return  0;
}报错:
: error C2352: 'CBoardPort::SetDAOutState' : illegal call of non-static member function
error C2352: 'CBoardPort::GetIOInState' : illegal call of non-static member function
error C2352: 'CBoardPort::SetIoOutState' : illegal call of non-static member function问：定义static UINT CBoardPort::LoopProtThread(LPVOID lParam);有问题？如果不定义静态就出错，问题在哪里?

Answer 1

小小意见，仅供参考：
1、定义static UINT CBoardPort::LoopProtThread(LPVOID lParam);定义的时候在类内部，不需要类名加域作用符吧
2、静态方法里不能调用非静态的方法吧 

Answer 2

UINT LoopProtThread(LPVOID lParam)
{
         CBoardPort* pDlg = (CBoardPort*)lParam;          //获取类句柄转换
        while(1)
        {
                pDlg->SetDAOutState();
                pDlg->GetIOInState();
                pDlg->SetIoOutState();
                Sleep(0);                                        }        
        return  0;
}m_pProtThread =AfxBeginThread(LoopProtThread,pParam,nPriority , nStackSize, dwCreateFlags , lpSecurityAttrs)error C2248: 'SetDAOutState' : cannot access protected member declared in class 'CBoardPort'
 error C2248: 'GetIOInState' : cannot access protected member declared in class 'CBoardPort'

Answer 3

所以要定义成类的静态成员函数,是因为类的静态成员函数不属于某个类对象,这样在调用函数
的时候就不用传递一个额外的this指针.public:
      void SetIoOutState(void);
        void GetIOInState(void);
        void SetDAOutState(void); UINT CBoardPort::LoopProtThread(LPVOID lParam)
{
        CBoardPort* pClass = (CBoardPort*)lParam;          //获取从类句柄转换
        while(1)
        {
                pClass->SetDAOutState();
                pClass->GetIOInState();
                pClass->SetIoOutState();
                Sleep(0);                                        }        
        return  0;
}
就OK了