How To Exactly Enumerate SQL Server From LAN By Using SQLDMO

// EnumServer2Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "EnumServer2.h"
#include "EnumServer2Dlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#import "C:\Program Files\Microsoft SQL Server\80\Tools\Binn\Resources\1033\sqldmo.rll" no_namespace
/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CEnumServer2Dlg dialog

CEnumServer2Dlg::CEnumServer2Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CEnumServer2Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CEnumServer2Dlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CEnumServer2Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEnumServer2Dlg)
	DDX_Control(pDX, IDC_COMBO1, m_ctlComboBox);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEnumServer2Dlg, CDialog)
	//{{AFX_MSG_MAP(CEnumServer2Dlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEnumServer2Dlg message handlers

BOOL CEnumServer2Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();
    AfxOleInit();
	// 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
   try
   {
    _SQLServerPtr spSQLServer;
     
    HRESULT hr2 = spSQLServer.CreateInstance(__uuidof(SQLServer));
     if (SUCCEEDED(hr2))
     {
        try
        {
           // Get the Application Ptr
           long lServerCount;
           _ApplicationPtr pApplication = spSQLServer->GetApplication();
           if (pApplication) 
		   {
                NameListPtr pServerNameList = pApplication->ListAvailableSQLServers();
                if (pServerNameList)
                { 
                    lServerCount = pServerNameList->Count;
					for (long  i=0;  i <  lServerCount; i++)
                    {
                        _bstr_t bstrValue(pServerNameList->Item( i ));
                         CString sName((LPCSTR)bstrValue);
                         if (!sName.IsEmpty())
                                m_ctlComboBox.AddString(sName);
                    }
                 }
            }
            pApplication = NULL;
                
            spSQLServer.Release();
        }
        catch (_com_error e)
        {
             spSQLServer.Release();     
        }
    }
    else
    {
        AfxMessageBox("Create Error.");
    }
 }
 catch (_com_error e)
 {
     AfxMessageBox("Error");
 }	
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CEnumServer2Dlg::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 CEnumServer2Dlg::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 CEnumServer2Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}