vfwdialog.cpp

一个简单的视频会议VC++MFC工程文件

// GraghDialog.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "GraghDialog.h"
#include "GraghDialogDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CGraghDialogApp

BEGIN_MESSAGE_MAP(CGraghDialogApp, CWinApp)
	//{{AFX_MSG_MAP(CGraghDialogApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG
	ON_COMMAND(ID_HELP, CWinApp::OnHelp)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGraghDialogApp construction

CGraghDialogApp::CGraghDialogApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CGraghDialogApp object

CGraghDialogApp theApp;
WSADATA	wsaData;

CString  g_szPropName = "视频会议";   //自己定义一个属性名
HANDLE   g_hValue = (HANDLE)1;               //自己定义一个属性值

BOOL CALLBACK EnumWndProc(HWND hwnd,LPARAM lParam)
{
	HANDLE h = GetProp(hwnd,g_szPropName);
	if( h == g_hValue)
	{
		*(HWND*)lParam = hwnd;
		return false;
	}
	return true;
}

/////////////////////////////////////////////////////////////////////////////
// CGraghDialogApp initialization

BOOL CGraghDialogApp::InitInstance()
{
	AfxEnableControlContainer();

	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif
	HWND oldHWnd = NULL;

	EnumWindows(EnumWndProc,(LPARAM)&oldHWnd);    //枚举所有运行的窗口

	if(oldHWnd != NULL)
	{
        AfxMessageBox("本程序已经在运行了");
        ::ShowWindow(oldHWnd,SW_SHOWNORMAL);          //激活找到的前一个程序
        ::SetForegroundWindow(oldHWnd);                //把它设为前景窗口
        return false;                                  //退出本次运行
	}

	if(!AfxSocketInit(&wsaData))
		AfxMessageBox("AfxSocketInit Failed");

	CGraghDialogDlg dlg;
	m_pMainWnd = &dlg;
	int nResponse = dlg.DoModal();
	if (nResponse == IDOK)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with OK
	}
	else if (nResponse == IDCANCEL)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with Cancel
	}

	// Since the dialog has been closed, return FALSE so that we exit the
	//  application, rather than start the application's message pump.
	return FALSE;
}