// OsInfoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "OsInfo.h"
#include "OsInfoDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// COsInfoDlg dialog

COsInfoDlg::COsInfoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(COsInfoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(COsInfoDlg)
	m_stInfo = _T("");
	m_stMinorVer = _T("");
	m_stServPack = _T("");
	m_stBuildNumber = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void COsInfoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(COsInfoDlg)
	DDX_Text(pDX, IDC_OS_STATIC, m_stInfo);
	DDX_Text(pDX, IDC_BUILD_STATIC, m_stMinorVer);
	DDX_Text(pDX, IDC_SPAK_STATIC, m_stServPack);
	DDX_Text(pDX, IDC_BUILDNO_STATIC, m_stBuildNumber);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(COsInfoDlg, CDialog)
	//{{AFX_MSG_MAP(COsInfoDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// COsInfoDlg message handlers

BOOL COsInfoDlg::OnInitDialog()
{
	CheckOSVersion();
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void COsInfoDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void COsInfoDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR COsInfoDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
//獲得版本信息
void COsInfoDlg::CheckOSVersion ()
{
	int stat = 0;
	char buffer[20];
	TCHAR data [64];
	DWORD dataSize;
	DWORD win95Info;
	OSVERSIONINFO versionInfo;
	HKEY hKey;
	LONG result;

	//設定OSVERSIONINFO的大小
	versionInfo.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);

	// 獲得版本信息
	if (!::GetVersionEx (&versionInfo)) {
		m_stInfo = (_T ("Not able to get OS information"));
		return;
	}

	// 如果是NT，檢查是Server還是WorkStation
	if (versionInfo.dwPlatformId == VER_PLATFORM_WIN32_NT) 
	{
		m_stInfo =  (_T ("Windows NT"));

		dataSize = sizeof (data);
		
		//打開注冊表
		result = ::RegOpenKeyEx (HKEY_LOCAL_MACHINE,
			"System\\CurrentControlSet\\Control\\ProductOptions",
			0, KEY_QUERY_VALUE, &hKey);

		if (result != ERROR_SUCCESS)
		{
			SetLastError (result);
			return;
		}
		
		result = ::RegQueryValueEx (hKey, _T("ProductType"), NULL, NULL,
			(LPBYTE) data, &dataSize);

		//關閉注冊表
		RegCloseKey (hKey);

		if (result != ERROR_SUCCESS) {
			SetLastError (result);
			return;
		}

		if (lstrcmpi (data, "WinNT") == 0) {
			m_stInfo = _T ("Windows NT Workstation");
		}
		else if (lstrcmpi (data, "ServerNT") == 0) {
			m_stInfo = _T ("Windows NT Server");
		}
		else {
			m_stInfo = _T ("Windows NT Server - Domain Controller");
		}

		// 檢查版本號
		if (versionInfo.dwMajorVersion == 3 || versionInfo.dwMinorVersion == 51) {
			m_stMinorVer = _T ("3.51");
		}
		else {
			m_stMinorVer = _T ("4.0");
		}

		// 獲得 build number.

		_itoa( versionInfo.dwBuildNumber, buffer, 10 );
		m_stBuildNumber = CString (buffer);
	}
	else if (versionInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) {
		m_stInfo = _T ("Windows 95");

		if ((versionInfo.dwMajorVersion > 4) || ((versionInfo.dwMajorVersion == 4)
			&& (versionInfo.dwMinorVersion > 0))) {
			m_stInfo = _T ("Windows 98");
		}

		//對win95,build number是低字節
		win95Info = (DWORD)(LOBYTE(LOWORD(versionInfo.dwBuildNumber)));

		_itoa( win95Info, buffer, 10 );
		m_stBuildNumber = CString (buffer);
	}
	else {
		m_stInfo = _T ("Windows 3.1");
	}

	// 獲得service pack信息
	m_stServPack = CString (versionInfo.szCSDVersion);
	m_stServPack.FreeExtra ();
}