1 从CWinThread派生自己的类(CAfxThread) :
class CAfxThread : public CWinThread
{
DECLARE_DYNCREATE(CAfxThread)
protected:
CAfxThread(); // protected constructor used by dynamic creation
// Attributes
public:
// Operations
public:
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAfxThread)
public:
virtual BOOL InitInstance();
virtual int ExitInstance();
//}}AFX_VIRTUAL
// Implementation
protected:
virtual ~CAfxThread();
// Generated message map functions
//{{AFX_MSG(CAfxThread)
// NOTE - the ClassWizard will add and remove member functions here.
afx_msg void OnAfxTest1Msg(WPARAM wParam, LPARAM lParam);
afx_msg void OnAfxTest2Msg(WPARAM wParam, LPARAM lParam);
afx_msg void OnAfxHelloMsg(WPARAM wParam,LPARAM lParam);
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
CAfxThread::CAfxThread()
{
}
CAfxThread::~CAfxThread()
{
}
BOOL CAfxThread::InitInstance()
{
// TODO: perform and per-thread initialization here
/*
//实现用户界面线程
CFrameWnd* pWnd = NULL;
pWnd = new CFrameWnd;
if ( pWnd )
{
pWnd->Create(NULL,"UI Thread Window");
pWnd->ShowWindow(SW_SHOW);
pWnd->UpdateWindow();
m_pMainWnd = pWnd;
}
return TRUE;
*/
/* CMultiThreadDlg dlg;
m_pMainWnd = &dlg;
dlg.DoModal();
return FALSE;*/
return TRUE;
}
int CAfxThread::ExitInstance()
{
// TODO: perform any per-thread cleanup here
AfxMessageBox( _T("Oh ! I Know It! Bye!") );
return CWinThread::ExitInstance();
}
BEGIN_MESSAGE_MAP(CAfxThread, CWinThread)
//{{AFX_MSG_MAP(CAfxThread)
// NOTE - the ClassWizard will add and remove mapping macros here.
ON_THREAD_MESSAGE(WM_AFX_TEST1_MSG,OnAfxTest1Msg)
ON_THREAD_MESSAGE(WM_AFX_TEST2_MSG,OnAfxTest2Msg)
ON_THREAD_MESSAGE(WM_AFX_HELLO_MSG,OnAfxHelloMsg)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CAfxThread message handlers
void CAfxThread::OnAfxTest1Msg( WPARAM wParam, LPARAM lParam )
{
MessageBox(NULL,_T("Hello World!"),_T("Test"),MB_OK);
}
void CAfxThread::OnAfxTest2Msg( WPARAM wParam, LPARAM lParam )
{
MessageBox(NULL,_T("Hello World!"),_T("Test"),MB_OK);
}
void CAfxThread::OnAfxHelloMsg(WPARAM wParam,LPARAM lParam)
{
AfxMessageBox( _T("Hello! I'm A Thread!") );
::PostThreadMessage( AfxGetApp()->m_nThreadID, WM_AFX_HELLO_MSG, m_nThreadID, 0 );
}
2 定义自定义消息宏:
#define WM_AFX_TEST1_MSG WM_USER + 100
#define WM_AFX_TEST2_MSG WM_USER + 101
#define WM_AFX_HELLO_MSG WM_USER + 102
3 下面看看如何创建线程吧:
#include "AfxThread.h"
void CMultiThreadDlg::OnBtnUsageFour()
{
// TODO: Add your control notification handler code here
//无界面，但有消息循环的线程
CWinThread *pThread = NULL;
pThread = AfxBeginThread (
RUNTIME_CLASS(CAfxThread), //线程类
THREAD_PRIORITY_NORMAL, //线程优先级
0, //Windows系统一般线程栈大小为1 MB，创建线程的数目与物理内存和栈空间大小有关
0, //线程创建标志，如：CREATE_SUSPENDED
NULL ); //系统安全描述，NULL
if ( pThread )
{
pThread->PostThreadMessage( WM_AFX_TEST1_MSG, 0, 0 );
Sleep(2000); //如果去掉这个就会丢失消息。呵呵，不信，你试试！
pThread->PostThreadMessage( WM_AFX_TEST2_MSG, 0, 0 );
//::PostThreadMessage( pThread->m_nThreadID, WM_AFX_TEST2_MSG, 0, 0 );
//这两种向线程发送消息的方法都可以
/*---------------------------------------------------------------------------*\
Call PostThreadMessage.
If it fails, call the Sleep function and call PostThreadMessage again.
Repeat until PostThreadMessage succeeds.
\*---------------------------------------------------------------------------*/
Sleep(2000);
pThread->PostThreadMessage( WM_QUIT, 0, 0 );//退出线程
}
}
void CMultiThreadDlg::OnBtnUsageFive()
{
// TODO: Add your control notification handler code here
//有界面的线程，当然了，也有消息循环了哦
/*
AfxBeginThread (
RUNTIME_CLASS(CAfxThread), //线程类
THREAD_PRIORITY_NORMAL, //线程优先级
0, //Windows系统一般线程栈大小为1 MB，创建线程的数目与物理内存和栈空间大小有关
0, //线程创建标志，如：CREATE_SUSPENDED
NULL ); //系统安全描述，NULL
//消息循环会随着窗口的关闭有自动退出，并清理自身对象
*/
/*
CAfxThread myThread;
myThread.CreateThread();
//这样是不行的...
*/
}