use2dlg.cpp

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// Use2Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "Use2.h"
#include "Use2Dlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CUse2Dlg dialog

CUse2Dlg::CUse2Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CUse2Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CUse2Dlg)
		// 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 CUse2Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CUse2Dlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CUse2Dlg, CDialog)
	//{{AFX_MSG_MAP(CUse2Dlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
	ON_BN_CLICKED(IDC_BUTTON4, OnButton4)
	ON_BN_CLICKED(IDC_BUTTON5, OnButton5)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CUse2Dlg message handlers

BOOL CUse2Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// 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
}

// 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 CUse2Dlg::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 CUse2Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

// 包含 CComPtr,CComQIPtr,CComBSTR 需要使用的头文件
#include <atlbase.h>

#include "..\Simple1\simple1.h"
#include "..\Simple1\Simple1_i.c"

void CUse2Dlg::OnButton3()	// CComPtr 使用举例
{
	// COM 初始化 以 AfxOleInit() 函数调用，放在了CUse2App::InitInstance() 中了。

	CComPtr < IUnknown > spUnk;		// 定义 IUnknown 的智能指针
	CComPtr < IFun > spFun;			// 定义 IFun 的智能指针
	HRESULT hr;

	try
	{
		// 可以使用 CLSID 启动组件，也可以使用 ProgID
		hr = spUnk.CoCreateInstance( CLSID_Fun );
		if( FAILED( hr ) )	throw( _T("没注册组件吧？") );

		hr = spUnk.QueryInterface( &spFun );
		if( FAILED( hr ) )	throw( _T("居然没有接口") );

		long nSum;
		hr = spFun->Add( 1, 2, &nSum );
		if( SUCCEEDED( hr ) )
		{
			CString sMsg;
			sMsg.Format( _T("1 + 2 = %d"), nSum );
			AfxMessageBox( sMsg );
		}

		CComBSTR s1( "Hello" ), s2( " world" ), s3;
		hr = spFun->Cat( s1, s2, &s3 );
		if( SUCCEEDED( hr ) )
		{
			CString sMsg( s3 );
			AfxMessageBox( sMsg );
		}
	}
	catch( LPCTSTR lpErr )
	{
		AfxMessageBox( lpErr );
	}

	// 智能指针的最大好处是 我们不用负责释放接口指针
}

void CUse2Dlg::OnButton4()		// CComQIPtr 使用举例
{
	CComPtr < IUnknown > spUnk;		// 定义 IUnknown 的智能指针
	CComQIPtr < IFun > spFun;		// 定义 IFun 的智能指针
	HRESULT hr;

	try
	{
		// 使用 ProgID 启动组件
		hr = spUnk.CoCreateInstance( L"Simple1.fun.1" );
		if( FAILED( hr ) )	throw( _T("没注册组件吧？") );

		spFun = spUnk;	// CComQIPtr 会帮咱们自动调用 QueryInterface
		if( !spFun )	throw( _T("居然没有接口") );	// 成功与否，可以用非 NULL 判断

		long nSum;
		hr = spFun->Add( 1, 2, &nSum );
		if( SUCCEEDED( hr ) )
		{
			CString sMsg;
			sMsg.Format( _T("1 + 2 = %d"), nSum );
			AfxMessageBox( sMsg );
		}

		CComBSTR s1( "Hello" ), s2( " world" ), s3;
		hr = spFun->Cat( s1, s2, &s3 );
		if( SUCCEEDED( hr ) )
		{
			CString sMsg( s3 );
			AfxMessageBox( sMsg );
		}
	}
	catch( LPCTSTR lpErr )
	{
		AfxMessageBox( lpErr );
	}
}

void CUse2Dlg::OnButton5()		// 不再经过 CComPtr< IUnknown >
{
	CComQIPtr < IFun, &IID_IFun > spFun;		// 定义 IFun 的智能指针
	HRESULT hr;

	try
	{
		hr = spFun.CoCreateInstance( L"Simple1.fun.1" );
		if( FAILED( hr ) )	throw( _T("没注册组件或没有接口？") );

		long nSum;
		hr = spFun->Add( 1, 2, &nSum );
		if( SUCCEEDED( hr ) )
		{
			CString sMsg;
			sMsg.Format( _T("1 + 2 = %d"), nSum );
			AfxMessageBox( sMsg );
		}

		CComBSTR s1( "Hello" ), s2( " world" ), s3;
		hr = spFun->Cat( s1, s2, &s3 );
		if( SUCCEEDED( hr ) )
		{
			CString sMsg( s3 );
			AfxMessageBox( sMsg );
		}
	}
	catch( LPCTSTR lpErr )
	{
		AfxMessageBox( lpErr );
	}
}