SourceCodeSky

/* 
   File: zddesk.cpp - Implementation of main CWinApp object.

   Implements ZDDesk's main application object and also implements the 
   about dialog box.

   Author: Steven E. Sipe
   
*/

#include "stdafx.h"
#include "zddesk.h"

#include "frame.h"
#include "splash.h"

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

/////////////////////////////////////////////////////////////////////////////
// CZDDeskApp

BEGIN_MESSAGE_MAP(CZDDeskApp, CWinApp)
   //{{AFX_MSG_MAP(CZDDeskApp)
   //}}AFX_MSG_MAP

   // Standard file based document commands
   ON_COMMAND(ID_FILE_NEW, CWinApp::OnFileNew)
   ON_COMMAND(ID_FILE_OPEN, CWinApp::OnFileOpen)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CZDDeskApp construction

// Constructor
CZDDeskApp::CZDDeskApp()
{
}

/////////////////////////////////////////////////////////////////////////////
// App object

// The one and only application object
CZDDeskApp theApp;

// Determine if we are running the new shell (i.e. Windows 95 or Windows NT 4.0
// or later)
BOOL CZDDeskApp::HasNewShell()
{
   // Get the Windows Version
   DWORD dwVersion = GetVersion();

   // Windows NT?
   if(dwVersion < 0x80000000) 
   {
       // Yes, Windows NT 4.0 or greater?
       if (LOBYTE(LOWORD(dwVersion)) >= 4) 
         return TRUE; 
   } // Windows 95?
   else if(LOBYTE(LOWORD(dwVersion)) >= 4) 
         return TRUE;

   return FALSE;  // Win16, 32s or NT3.x.
}


// Determine if ZDDesk is already running by using a Mutex object -- returns
// TRUE if already running, FALSE otherwise.  Note that a mutex is created
// with the name of the application
BOOL CZDDeskApp::AlreadyRunning()
{
   BOOL bFound = FALSE;

   // Try to create a mutex with the app's name
   HANDLE hMutexOneInstance = ::CreateMutex(NULL,TRUE,_T(AfxGetAppName()));

   // Already there...means that we are already running an instance
   if(::GetLastError() == ERROR_ALREADY_EXISTS)
      bFound = TRUE;

   // Release the mutex
   if(hMutexOneInstance)
      ::ReleaseMutex(hMutexOneInstance);

   return(bFound);
}

/////////////////////////////////////////////////////////////////////////////
// CZDDeskApp initialization

// Performs instance initialization for the application
BOOL CZDDeskApp::InitInstance()
{
   // Command line info -- used by the splash screen
   CCommandLineInfo cmdInfo;
   ParseCommandLine(cmdInfo);

   // Only allow one instance of our application to execute
   if(AlreadyRunning())
   {
      AfxMessageBox(IDS_ALREADY_RUNNING,MB_OK|MB_ICONWARNING);
      return(FALSE);
   }

   // Only run with the new shell --- we need a system tray
   if(!HasNewShell())
   {
      AfxMessageBox(IDS_WRONG_SHELL,MB_OK|MB_ICONSTOP);
      return(FALSE);
   }

   // Setup the splash screen
   CSplashWnd::EnableSplashScreen(cmdInfo.m_bShowSplash);

   // [!==More==!]