线程函数里面调用CEdit对象就报错？

[USTCwangjian]

小弟创建两个PC间的蓝牙通信
头文件

public:
	afx_msg void OnBnClickedButton1();
	 CEdit m_edit1;
		CEdit m_edit2;
	afx_msg void OnEnChangeEdit2();
	afx_msg void OnBnClickedStart();

	CButton m_button_say;

	CWinThread* hThread0; 
	CWinThread* hThread1;
   SOCKET	sock;
   static	UINT _cdecl onListen0(LPVOID lpvThreadParm);
   static UINT  _cdecl onRecieve1(LPVOID lpvThreadParm);
线程函数：
/////服务器监听线程/////
UINT  CBLUETOOTHDlg::onListen0(LPVOID lpvThreadParm)
{
	// CBLUETOOTHDlg m_blu;
	
	CBLUETOOTHDlg*pthis = (CBLUETOOTHDlg*)lpvThreadParm;
//	pthis->OnBnClickedStart();
	SOCKADDR_BTH sa;
	int sa_len = sizeof(sa);
	while (1)
	{
		memset(&sa, 0, sa_len);
		pthis->sock = accept(sockTCP, (LPSOCKADDR)&sa, &sa_len);
		if (SOCKET_ERROR == pthis-> sock)
		{
			//AfxMessageBox("sock监听套接字失败！");
		}
		else//连接成功
		{
			
			pthis->m_edit1.SetSel(pthis->m_edit1.GetWindowTextLengthA(), pthis->m_edit1.GetWindowTextLengthA());
			pthis->m_edit1.ReplaceSel("客户端连接成功！");
			pthis->m_button_say.EnableWindow(TRUE);
			pthis->hThread1->ResumeThread();
			pthis->bThread1 = TRUE;
			pthis->hThread1 = AfxBeginThread(onRecieve1, lpvThreadParm, THREAD_PRIORITY_NORMAL, 0, 0, NULL);
		}

为什么pthis指针一调用m_edit1就报错：0xC0000005: 读取位置 0x00000048 时发生访问冲突。

[真相重于对错]

后台线程不允许直接访问界面，最好通过发送消息的方式

[oyljerry]

PostMessage发消息给主线程，然后主线程来操作控件CEdit

[赵4老师]

Multiple Threads in the User Interface http://msdn.microsoft.com/zh-cn/library/ms810439.aspx

[smwhotjay]

子线程不能直接操作ui 安卓也是， 绕过的办法就是传递消息。安卓是用handler ,win32用postmessage

[Eleven]

MFC类非线程安全的，不要在线程函数中直接去访问UI线程中的控件信息。