使用MFC中的AfxBeginThread创建多线程

DWORD WINAPI ThreadProc(LPVOID pParam)

{

    CDC* pdc;

    //将传入的参数转为RECT*

    RECT* rect=(RECT*)pParam;  

    //得到设备句柄

    pdc=AfxGetApp()->m_pMainWnd->GetDC();  

    //设置画刷

    CBrush brush(HS_VERTICAL,RGB(0,255,0));  

    //选入到设备中

    CBrush* oldbrush=pdc->SelectObject(&brush);  

    int n=0;

    while(n++<=2000)

    {

        pdc->Rectangle(rect->left,rect->top,rect->right+n,rect->bottom );

        Sleep(1);        

    }

    pdc->SelectObject(oldbrush);

    pdc->ReleaseOutputDC();

    return 0;

}

void CCreateThreadRectDlg::OnThread() 

{

    // TODO: Add your control notification handler code here

    RECT rect1;

    rect1.left=20;  //左上角x坐标

    rect1.top=100;    //左上角y坐标

    rect1.right=20;       //右下角x坐标

    rect1.bottom =rect1.top +100;   //右下角y坐标

    //创建第一个线程ThreadProc,相对优先级THREAD_PRIORITY_IDLE面对任何等级调整为1    

    AfxBeginThread((AFX_THREADPROC)ThreadProc,&rect1,THREAD_PRIORITY_IDLE);

    RECT rect2;

    rect2.left=rect1.left;

    rect2.top=rect1.bottom +20;

    rect2.right=rect1.right;

    rect2.bottom =rect2.top +100;

    //创建第二个线程ThreadProc,相对优先级THREAD_PRIORITY_TIME_CRITICAL

    //面对任何等级调整为15,面对REALTIME等级调整为32

    AfxBeginThread((AFX_THREADPROC)ThreadProc,&rect2,THREAD_PRIORITY_TIME_CRITICAL);

}