ColorAndMono.cpp

//************************************************************************
//  The Logitech LCD SDK, including all acompanying documentation,
//  is protected by intellectual property laws.  All use of the Logitech
//  LCD SDK is subject to the License Agreement found in the
//  "Logitech LCD SDK License Agreement" file and in the Reference Manual.  
//  All rights not expressly granted by Logitech are reserved.
//************************************************************************

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

#include "stdafx.h"
#include "ColorAndMono.h"
#include "ColorAndMonoDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

#define LCDSAMPLE_MUTEXNAME               _T("LCDSample_Mutex_1_0")

// CColorAndMonoApp

BEGIN_MESSAGE_MAP(CColorAndMonoApp, CWinApp)
    ON_COMMAND(ID_HELP, &CWinApp::OnHelp)
END_MESSAGE_MAP()


// CColorAndMonoApp construction

CColorAndMonoApp::CColorAndMonoApp()
{
    // TODO: add construction code here,
    // Place all significant initialization in InitInstance
    m_hMutex = NULL;
    m_gdiplusToken = NULL;
}


// The one and only CColorAndMonoApp object

CColorAndMonoApp theApp;


// CColorAndMonoApp initialization

BOOL CColorAndMonoApp::InitInstance()
{
    // InitCommonControlsEx() is required on Windows XP if an application
    // manifest specifies use of ComCtl32.dll version 6 or later to enable
    // visual styles.  Otherwise, any window creation will fail.
    INITCOMMONCONTROLSEX InitCtrls;
    InitCtrls.dwSize = sizeof(InitCtrls);
    // Set this to include all the common control classes you want to use
    // in your application.
    InitCtrls.dwICC = ICC_WIN95_CLASSES;
    InitCommonControlsEx(&InitCtrls);

    // Initialize GDI+
    Gdiplus::GdiplusStartupInput gdiplusStartupInput;
    GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL);

    CWinApp::InitInstance();

    // 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
    // Change the registry key under which our settings are stored
    // TODO: You should modify this string to be something appropriate
    // such as the name of your company or organization
    SetRegistryKey(_T("Local AppWizard-Generated Applications"));

    m_hMutex = ClaimMutex(LCDSAMPLE_MUTEXNAME, NULL);
    if(NULL == m_hMutex)
    {
        return FALSE;
    }

    CColorAndMonoDlg dlg;
    m_pMainWnd = &dlg;
    INT_PTR 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;
}

INT CColorAndMonoApp::ExitInstance() 
{
    if(NULL != m_hMutex)
    {
        ReleaseMutex(m_hMutex);
        CloseHandle(m_hMutex);
        m_hMutex = NULL;
    }
    
    Gdiplus::GdiplusShutdown(m_gdiplusToken);

    return CWinApp::ExitInstance();
}

HANDLE CColorAndMonoApp::ClaimMutex(LPCTSTR szMutex, LPCTSTR szWndClassName)
{
    // attempt to claim the mutex
    HANDLE hMutex = CreateMutex(NULL, TRUE, szMutex);
    if (ERROR_ALREADY_EXISTS == GetLastError())
    {
        if (hMutex)
        {
            CloseHandle(hMutex);
            hMutex = NULL;
        }

        // bring the existing wnd to the foreground
        if (szWndClassName)
        {
            HWND hExistingWnd = FindWindow(szWndClassName, NULL);
            if (hExistingWnd)
            {
                ShowWindow(hExistingWnd, SW_RESTORE);
                SetForegroundWindow(hExistingWnd);
            }
        }
        return NULL;
    }

    return hMutex;
}