VS2010窗口的最大化

本文对比了在VC6和VC2010中实现窗口最大化的代码差异,并解释了原因。通过分析初始化实例过程中的关键步骤,我们发现VC2010引入了更多初始化选项以支持现代应用程序需求,同时保留了窗口最大化的功能。

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我们知道,在vc6中窗口最大化只用下面的代码就可以实现:


BOOL CTestvc6App::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

	// 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"));

	LoadStdProfileSettings();  // Load standard INI file options (including MRU)

	// Register the application's document templates.  Document templates
	//  serve as the connection between documents, frame windows and views.

	CSingleDocTemplate* pDocTemplate;
	pDocTemplate = new CSingleDocTemplate(
		IDR_MAINFRAME,
		RUNTIME_CLASS(CTestvc6Doc),
		RUNTIME_CLASS(CMainFrame),       // main SDI frame window
		RUNTIME_CLASS(CTestvc6View));
	AddDocTemplate(pDocTemplate);

	// Parse command line for standard shell commands, DDE, file open
	CCommandLineInfo cmdInfo;
	ParseCommandLine(cmdInfo);

	// Dispatch commands specified on the command line
	if (!ProcessShellCommand(cmdInfo))
		return FALSE;

	// The one and only window has been initialized, so show and update it.
	m_pMainWnd->ShowWindow(SW_MAXIMIZE);
	m_pMainWnd->UpdateWindow();

	return TRUE;
}

然而在vc2010中,这样做是不会最大化窗口的,那么它的实现方法是什么呢?加入一句话就行了:

BOOL Ctestvs2010App::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);

	CWinAppEx::InitInstance();


	// Initialize OLE libraries
	if (!AfxOleInit())
	{
		AfxMessageBox(IDP_OLE_INIT_FAILED);
		return FALSE;
	}

	AfxEnableControlContainer();

	EnableTaskbarInteraction(FALSE);

	// AfxInitRichEdit2() is required to use RichEdit control	
	// AfxInitRichEdit2();

	// 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"));
	LoadStdProfileSettings(4);  // Load standard INI file options (including MRU)


	InitContextMenuManager();

	InitKeyboardManager();

	InitTooltipManager();
	CMFCToolTipInfo ttParams;
	ttParams.m_bVislManagerTheme = TRUE;
	theApp.GetTooltipManager()->SetTooltipParams(AFX_TOOLTIP_TYPE_ALL,
		RUNTIME_CLASS(CMFCToolTipCtrl), &ttParams);

	// Register the application's document templates.  Document templates
	//  serve as the connection between documents, frame windows and views
	CSingleDocTemplate* pDocTemplate;
	pDocTemplate = new CSingleDocTemplate(
		IDR_MAINFRAME,
		RUNTIME_CLASS(Ctestvs2010Doc),
		RUNTIME_CLASS(CMainFrame),       // main SDI frame window
		RUNTIME_CLASS(Ctestvs2010View));
	if (!pDocTemplate)
		return FALSE;
	AddDocTemplate(pDocTemplate);

	CleanState(_T("WorkSpace"));
	// Parse command line for standard shell commands, DDE, file open
	CCommandLineInfo cmdInfo;
	ParseCommandLine(cmdInfo);



	// Dispatch commands specified on the command line.  Will return FALSE if
	// app was launched with /RegServer, /Register, /Unregserver or /Unregister.
	if (!ProcessShellCommand(cmdInfo))
		return FALSE;

	// The one and only window has been initialized, so show and update it
	m_pMainWnd->ShowWindow(SW_MAXIMIZE);
	m_pMainWnd->UpdateWindow();
	// call DragAcceptFiles only if there's a suffix
	//  In an SDI app, this should occur after ProcessShellCommand
	return TRUE;
}


这样就会实现窗口的最大化。

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