如何使用CEvent对象！

Question

#include <afxmt.h>
//---------- g_var
UINT ThreadProc(LPVOID pParam);
CEvent g_eBusy;
BOOL CPicFileDlg::OnInitDialog() 
{
CFileDialog::OnInitDialog();

// TODO: Add extra initialization here
SetTimer(1, 500, NULL);
g_eBusy.SetEvent(); return TRUE;  // return TRUE unless you set the focus to a control
              // EXCEPTION: OCX Property Pages should return FALSE
}
UINT ThreadProc(LPVOID pParam)
{
g_eBusy.ResetEvent(); CWnd hWnd;
hWnd.Attach((HWND)pParam);
ASSERT(hWnd); CRect m_Rect;
CDC *m_pDC;
hWnd.GetClientRect(&m_Rect);
m_pDC=hWnd.GetDC(); PreViewPic(g_sFileName, m_pDC, m_Rect);

hWnd.Detach();

g_eBusy.SetEvent();
return 0;
}

Answer 1

那WaitForSingalObject()到哪里去了？例如：我的这段代码如何用CEvent类改写？
void CEventTestDlg::OnButton1() 
{
// TODO: Add your control notification handler code here m_hEvent = CreateEvent(
NULL,         // no security attributes
        TRUE,         // manual-reset event
        TRUE,         // initial state is signaled
        "TestEvent"  // object name
        );

ResetEvent(m_hEvent);
AfxBeginThread(SimProc,m_hEvent);
DWORD dwWaitResult=0;
dwWaitResult = WaitForSingleObject(m_hEvent,5000);
switch(dwWaitResult)
{
case WAIT_ABANDONED:

break;
case WAIT_OBJECT_0: 
MessageBox("proc finish!");
break;
case WAIT_TIMEOUT:
MessageBox("Time Out");
break;
default:
break;
}
CloseHandle(m_hEvent);

}UINT SimProc(LPVOID pParam)
{//Process.......
.......//
HANDLE hEvent = (HANDLE)pParam;
if (!hEvent) 
{
ASSERT(FALSE);
return -1;
}
SetEvent(hEvent);
return 0;
}

Answer 2

俺不过少贴了2段代码而已，如下：void CPicFileDlg::OnTimer(UINT nIDEvent) 
{
// TODO: Add your message handler code here and/or call default
CString sName=GetFileName(), sExt=GetFileExt(); if (sName=="" && sExt.CompareNoCase("bmp") && sExt.CompareNoCase("gif") && sExt.CompareNoCase("jpg"))
return; if (g_sFileName.CompareNoCase(sName) && WaitForSingleObject(g_eBusy, 0)==WAIT_OBJECT_0)
{
g_sFileName=sName;
AfxBeginThread(ThreadProc,m_hPicView.GetSafeHwnd());
}

CFileDialog::OnTimer(nIDEvent);
}void CPicFileDlg::OnDestroy() 
{
// TODO: Add your message handler code here
KillTimer(1);
WaitForSingleObject(g_eBusy, INFINITE); CFileDialog::OnDestroy();
}