刚刚学多线程，请高手指点

使用类静态函数作为线程入口函数，并作强制类型转换LPTHREAD_START_ROUTINE

不好意思，发错了代码。以下是更正的：void CMultiThread1Dlg::OnBnClickedStart()
{
// TODO: 在此添加控件通知处理程序代码
hThread=CreateThread(NULL,
0,
(LPTHREAD_START_ROUTINE)CMultiThread1Dlg::ThreadFunc, //error
NULL,
0,
&ThreadID);
GetDlgItem(IDC_START)->EnableWindow(FALSE);
GetDlgItem(IDC_STOP)->EnableWindow(TRUE);
}

确认CMultiThread1Dlg::ThreadFunc为静态函数。

刚在 MultiThread1Dlg.h改了，public:
static void ThreadFunc();结果又有新错了， error LNK2019: 无法解析的外部符号 "protected: static void __cdecl CMultiThread1Dlg::ThreadFunc(void)" (?ThreadFunc@CMultiThread1Dlg@@KAXXZ)，该符号在函数 "public: void __thiscall CMultiThread1Dlg::OnBnClickedStart(void)" (?OnBnClickedStart@CMultiThread1Dlg@@QAEXXZ) 中被引用
fatal error LNK1120: 1 个无法解析的外部命令

我记得如果用afxbeginthread
进程参数为：LPVOID lpParameter,用强转为当前的CxxxDialog *就可以直接再线程中调用Dlg的内容了

static DWORD WINAPI ThreadProc(LPVOID lpParameter)
{
OutputDebugString(_T("ThreadProc\r\n"));
return 0;
}int nParam = 110;
DWORD dwThreadID = 0;
HANDLE hThread = CreateThread(NULL,0,ThreadProc,&nParam,0,&dwThreadID);

不是太明白，HANDLE CreateThread(LPSECURITY_ATTRIBUTES lpThreadAttributes,
                 DWORD dwStackSize,
                 LPTHREAD_START_ROUTINE lpStartAddress,
                 LPVOID lpParameter,
                 DWORD dwCreationFlags,
                 LPDWORD lpThreadId);你的意思是把第4个参数也改吗？

lpParameter：向线程函数传递的参数，是一个指向结构的指针，不需传递参数时，为NULL。

DWORD WINAPI ThreadFuncsk(LPVOID lpParameter)
{
OutputDebugString(_T("ThreadProc\r\n"));
return 0;
}
DWORD ThreadID;//线程ID;
HANDLE hthread = CreateThread(NULL,0,ThreadFuncsk,0,0,&ThreadID);

注意返回类型就可以了：
DWORD WINAPI

//CMultiThread1Dlg.h
class CMultiThread1Dlg : public CDialog
{

protected:
HANDLE hThread;
DWORD ThreadID;
public:
void ThreadFunc();
afx_msg void OnBnClickedStart();
afx_msg void OnBnClickedStop();
};//CMultiThread1Dlg.cpp
void CMultiThread1Dlg::OnBnClickedStart()
{
// TODO: 在此添加控件通知处理程序代码
hThread=CreateThread(NULL,
0,
(LPTHREAD_START_ROUTINE)CMultiThread1Dlg::ThreadFunc, //error
NULL,
0,
&ThreadID);error C2440: “类型转换”: 无法从“overloaded-function”转换为“LPTHREAD_START_ROUTINE”

//CMultiThread1Dlg.h
class CMultiThread1Dlg : public CDialog
{

protected:
HANDLE hThread;
DWORD ThreadID;
public:
staic void ThreadFunc();
afx_msg void OnBnClickedStart();
afx_msg void OnBnClickedStop();
};//CMultiThread1Dlg.cpp
void CMultiThread1Dlg::OnBnClickedStart()
{
// TODO: 在此添加控件通知处理程序代码
hThread=CreateThread(NULL,
0,
(LPTHREAD_START_ROUTINE)CMultiThread1Dlg::ThreadFunc, //error
NULL,
0,
&ThreadID);
error LNK2019: 无法解析的外部符号 "protected: static void __cdecl CMultiThread1Dlg::ThreadFunc(void)" (?ThreadFunc@CMultiThread1Dlg@@KAXXZ)，该符号在函数 "public: void __thiscall CMultiThread1Dlg::OnBnClickedStart(void)" (?OnBnClickedStart@CMultiThread1Dlg@@QAEXXZ) 中被引用
fatal error LNK1120: 1 个无法解析的外部命令

你的线线程函数不对, static void ThreadFunc(); 这个函数原型就不对, 线程函数必需有一个参数, 返回值. 就像10楼这位同学那样. 你看下LPTHREAD_START_ROUTINE的定义, 线程函数的原型要跟它的原型定义的一模一样!

还有调用约定,就是WINAPI这个宏定义,实际就是__stdcall

头文件中，修改如下
public:
static DWORD WINAPI ThreadFunc(LPVOID lpParam);cpp中，函数如下
DWORD WINAPI CMultiThread1Dlg::ThreadFunc(LPVOID lpParam)
{
/* code... */
return 0;
}调用处:
DWORD ThreadID = 0;
hThread=CreateThread(NULL, 0, ThreadFunc, NULL, 0, &ThreadID);

static LRESULT myFunc(LPVOID pParam);//pParam可以将窗口的句柄或指针传递进来

void CCLJCnet1Dlg::OnBnClickedConnect()
{
// TODO: 在此添加控件通知处理程序代码
/*if (mSckSender!=0)
{
closesocket(mSckSender);
mSckSender=0;
}
if (mSckSender==0)
{
mSckSender=socket(AF_INET,SOCK_STREAM,0);
ASSERT(mSckSender!=0);
}
SOCKADDR_IN m_addr;
BOOL flag = TRUE;
//int ret = setsockopt(mSckReceiver, SOL_SOCKET, SO_REUSEADDR,
//(char *) &flag, sizeof(flag));
m_addr.sin_family = AF_INET;
m_addr.sin_addr.s_addr = inet_addr("192.168.10.11");
//注意服务器端在 SERVER_UDP_PORT 10096 上接收数据，而在CLIENT_UDP_PORT
//上发送数据，而客户端恰好相反
m_addr.sin_port = htons(3333);
ret = bind(mSckReceiver, (struct sockaddr*) &m_addr, sizeof(m_addr));
//AfxMessageBox("网络已连接，等待传送数据");*/
SOCKET socketServer;
SOCKADDR_IN sin;
sockServer=socket(PF_INET,SOCK_STREAM,0);
sin.sin_family=AF_INET;
sin.sin_addr.s_addr=ulAddress;
sin.sin_port=htons(4009);
int nConnect=connect(sockServer, (LPSOCKADDR)&sin, sizeof(struct sockaddr)); CString str="16 16 02 01 03 22 00";
LPCTSTR p=str;

int nCharSend=send(sockServer,(char*)&str,sizeof(str),0);
if(nCharSend==SOCKET_ERROR)
MessageBox("发送过程中发生一个错误！",NULL,MB_OK);}

[code=C/C++][/codevoid CCLJCnet1Dlg::OnBnClickedConnect()
{
// TODO: 在此添加控件通知处理程序代码
/*if (mSckSender!=0)
{
closesocket(mSckSender);
mSckSender=0;
}
if (mSckSender==0)
{
mSckSender=socket(AF_INET,SOCK_STREAM,0);
ASSERT(mSckSender!=0);
}
SOCKADDR_IN m_addr;
BOOL flag = TRUE;
//int ret = setsockopt(mSckReceiver, SOL_SOCKET, SO_REUSEADDR,
//(char *) &flag, sizeof(flag));
m_addr.sin_family = AF_INET;
m_addr.sin_addr.s_addr = inet_addr("192.168.10.11");
//注意服务器端在 SERVER_UDP_PORT 10096 上接收数据，而在CLIENT_UDP_PORT
//上发送数据，而客户端恰好相反
m_addr.sin_port = htons(3333);
ret = bind(mSckReceiver, (struct sockaddr*) &m_addr, sizeof(m_addr));
//AfxMessageBox("网络已连接，等待传送数据");*/
SOCKET socketServer;
SOCKADDR_IN sin;
sockServer=socket(PF_INET,SOCK_STREAM,0);
sin.sin_family=AF_INET;
sin.sin_addr.s_addr=ulAddress;
sin.sin_port=htons(4009);
int nConnect=connect(sockServer, (LPSOCKADDR)&sin, sizeof(struct sockaddr)); CString str="16 16 02 01 03 22 00";
LPCTSTR p=str;

int nCharSend=send(sockServer,(char*)&str,sizeof(str),0);
if(nCharSend==SOCKET_ERROR)
MessageBox("发送过程中发生一个错误！",NULL,MB_OK);}]

调试易

刚刚学多线程，请高手指点

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