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

#include "stdafx.h"
#include "EllipseWnd.h"
#include "EllipseWndDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CEllipseWndApp

BEGIN_MESSAGE_MAP(CEllipseWndApp, CWinApp)
	//{{AFX_MSG_MAP(CEllipseWndApp)
		// 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()

/////////////////////////////////////////////////////////////////////////////
// CEllipseWndApp construction

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

/////////////////////////////////////////////////////////////////////////////
// The one and only CEllipseWndApp object

CEllipseWndApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CEllipseWndApp initialization

BOOL CEllipseWndApp::InitInstance()
{
	// Create a Semaphore with a name of application exename
	HANDLE hSem = CreateSemaphore(NULL, 1, 1, m_pszExeName);
	if (GetLastError() == ERROR_ALREADY_EXISTS)
	{
		// close the semaphore handle
		CloseHandle(hSem);

		// find the provious instance main window
		HWND hWndPrevious = ::GetWindow(::GetDesktopWindow(), GW_CHILD);
		while (::IsWindow(hWndPrevious))
		{
			// if the window has our tag?
			if (::GetProp(hWndPrevious, m_pszExeName))
			{
				if (::IsIconic(hWndPrevious))
					::ShowWindow(hWndPrevious, SW_RESTORE);
				::SetForegroundWindow(hWndPrevious);
				::SetForegroundWindow(::GetLastActivePopup(hWndPrevious));
	
				return FALSE;
			}

			// continue find next window
			hWndPrevious = ::GetWindow(hWndPrevious, GW_HWNDNEXT);
		}

		// the previous instance is exist, but can not be found
		// somthing wrong?
		return FALSE;
	}
	
	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

	CEllipseWndDlg 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;
}