弹出对话框的代码 ：

主要是弹出对话框的时候可以在后台做某些动作：

与直接弹出对话框前开启线程，在线程中做某些动作效果相同。

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MsgBoxThread mbt;
mbt.MesgBoxPopup(10, "do something");
// do something 
// do something
mbt.WaitFor(); // 等待线程退出

使用到的MsgThread和对话框类

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#include "StdAfx.h"
#include "MsgBoxThread.h"
 
#include "YF_GCM.h"
#include "DlgMesgBox.h"
 
unsigned int __stdcall ThreadBox(LPVOID);  
 
MsgBoxThread::MsgBoxThread(void)
{
}
 
MsgBoxThread::~MsgBoxThread(void)
{
}
 
int MsgBoxThread::MesgBoxPopup(int time, const CString& szText)
{
    m_Mesg.text = szText;
    m_Mesg.time = time;
 
    m_handle[0] = (HANDLE)_beginthreadex(NULL, 0, ThreadBox, (LPVOID)&m_Mesg, 0, NULL); 
    return 0;
}
 
unsigned int __stdcall ThreadBox(LPVOID lp)
{
    _mesg *pTmpMesg = (_mesg *)lp;
    CDlgMesgBox box;
    box.SetDlgLifetime(pTmpMesg->time);
    box.SetBoxText(pTmpMesg->text);
    box.DoModal();
//     
    return 0;
}
int MsgBoxThread::WaitFor(void)
{
    WaitForMultipleObjects(1, m_handle, TRUE, INFINITE);  
    return 0;
}
#pragma once
struct _mesg{
    CString text;
    int time;
};
class MsgBoxThread
{
public:
    MsgBoxThread(void);
    virtual ~MsgBoxThread(void);
    int MesgBoxPopup(int time, const CString& szText);
private:
    _mesg m_Mesg;
    HANDLE m_handle[1];
public:
    int WaitFor(void);
};
#pragma once
 
 
// CDlgMesgBox 对话框
 
class CDlgMesgBox : public CDialog
{
	DECLARE_DYNAMIC(CDlgMesgBox)
 
public:
	CDlgMesgBox(CWnd* pParent = NULL);   // 标准构造函数
	virtual ~CDlgMesgBox();
 
// 对话框数据
	enum { IDD = IDD_DIALOG_MESGBOX };
 
protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持
 
	DECLARE_MESSAGE_MAP()
public:
    int SetDlgLifetime(int secTime);
private:
    enum{BoxLifetime = 1, BoxUpdate = 2};
    int m_Lifetime;
public:
    virtual BOOL OnInitDialog();
    afx_msg void OnTimer(UINT_PTR nIDEvent);
    void UpdateBox(void);
    void SetBoxText(const CString& szText);
private:
    CString m_szMsgText;
public:
    afx_msg void OnBnClickedBoxButtonExit();
};
// DlgMesgBox.cpp : 实现文件
//
 
#include "stdafx.h"
#include "YF_GCM.h"
#include "DlgMesgBox.h"
 
 
// CDlgMesgBox 对话框
 
IMPLEMENT_DYNAMIC(CDlgMesgBox, CDialog)
 
CDlgMesgBox::CDlgMesgBox(CWnd* pParent /*=NULL*/)
	: CDialog(CDlgMesgBox::IDD, pParent)
    , m_Lifetime(10000)
    , m_szMsgText(_T(""))
{
 
}
 
CDlgMesgBox::~CDlgMesgBox()
{
}
 
void CDlgMesgBox::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}
 
 
BEGIN_MESSAGE_MAP(CDlgMesgBox, CDialog)
    ON_WM_TIMER()
    ON_BN_CLICKED(IDC_BOX_BUTTON_EXIT, &CDlgMesgBox::OnBnClickedBoxButtonExit)
END_MESSAGE_MAP()
 
 
// CDlgMesgBox 消息处理程序
 
int CDlgMesgBox::SetDlgLifetime(int secTime)
{
    m_Lifetime = secTime;
    return 0;
}
 
BOOL CDlgMesgBox::OnInitDialog()
{
    CDialog::OnInitDialog();
 
    // TODO:  在此添加额外的初始化
 
    SetTimer(BoxUpdate, 1000, NULL);
    SetDlgItemText(IDC_BOX_STATIC_MSG, m_szMsgText);
 
    return TRUE;  // return TRUE unless you set the focus to a control
    // 异常: OCX 属性页应返回 FALSE
}
 
void CDlgMesgBox::OnTimer(UINT_PTR nIDEvent)
{
    // TODO: 在此添加消息处理程序代码和/或调用默认值
    switch (nIDEvent)
    {
    case BoxUpdate: 
        UpdateBox();
        if (0 == m_Lifetime)
        {
            SendMessage(WM_CLOSE);
        }
        else
        {
            --m_Lifetime;
        }
        break;
    default:break;
    }
    CDialog::OnTimer(nIDEvent);
}
 
void CDlgMesgBox::UpdateBox(void)
{
    CString szText;
    szText.Format(_T("关闭(%d)"), m_Lifetime);
    SetDlgItemText(IDC_BOX_BUTTON_EXIT, szText); // 在按钮上显示关闭倒计时
}
 
void CDlgMesgBox::SetBoxText(const CString& szText)
{
    m_szMsgText = szText;
}
 
void CDlgMesgBox::OnBnClickedBoxButtonExit()
{
    // TODO: 在此添加控件通知处理程序代码
    SendMessage(WM_CLOSE);
}