多线程示例(一) 线程的创建与启动

// ComputeDialog.cpp : 实现文件//#include "stdafx.h"#include "Ex13.h"#include "ComputeDialog.h"//int g_nCount = 0;UINT ComputeThreadProc(LPVOID pParam){for(int i = 0; i < 100000 ; ++i)for (int j = 0; j < 100000; ++j){}TRACE(_T("Finished"));::PostMessage((HWND)pParam, WM_THREADFINISHED, 0, 0);return 0;}// CComputeDialog 对话框IMPLEMENT_DYNAMIC(CComputeDialog, CDialog)CComputeDialog::CComputeDialog(CWnd* pParent /*=NULL*/): CDialog(CComputeDialog::IDD, pParent),g_nCount(0){}CComputeDialog::~CComputeDialog(){}void CComputeDialog::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(CComputeDialog, CDialog)ON_BN_CLICKED(IDC_START, &CComputeDialog::OnBnClickedStart)ON_BN_CLICKED(IDC_CANCEL, &CComputeDialog::OnBnClickedCancel)ON_WM_TIMER()ON_MESSAGE(WM_THREADFINISHED, OnThreadFinished)END_MESSAGE_MAP()LRESULT CComputeDialog::OnThreadFinished(WPARAM wParam, LPARAM lParam){GetDlgItem(IDC_START)->EnableWindow(TRUE);KillTimer(1);//CDialog::OnOK();return 0;}// CComputeDialog 消息处理程序void CComputeDialog::OnBnClickedStart(){// TODO: 在此添加控件通知处理程序代码//MSG message;m_nTimer = SetTimer(1, 100, NULL);ASSERT(m_nTimer != 0);GetDlgItem(IDC_START)->EnableWindow(FALSE);AfxBeginThread(ComputeThreadProc, GetSafeHwnd(), THREAD_PRIORITY_NORMAL);}void CComputeDialog::OnBnClickedCancel(){// TODO: 在此添加控件通知处理程序代码if(g_nCount == 0)CDialog::OnCancel();else{g_nCount = nMaxCount;KillTimer(1);CDialog::OnCancel();}}void CComputeDialog::OnTimer(UINT_PTR nIDEvent){// TODO: 在此添加消息处理程序代码和/或调用默认值CProgressCtrl* pBar = (CProgressCtrl*) GetDlgItem(IDC_PROGRESS1);g_nCount+=1000;TRACE("In OnTimer: g_nCount = %d/n", g_nCount);if (g_nCount < nMaxCount)pBar->SetPos(g_nCount*100 / nMaxCount);CDialog::OnTimer(nIDEvent);}