Morse code. Some examples of how to produce sounds.

// MorseDlg.cpp : implementation file
// Part of "Morse" project. (C) Alexander Fedorov, 2000. lamer2000@hotmail.com
//

#include "stdafx.h"
#include "Morse.h"
#include "MorseDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMorseDlg dialog

CMorseDlg::CMorseDlg(CWnd* pParent /*=NULL*/)
    : CDialog(CMorseDlg::IDD, pParent)
{
    //{{AFX_DATA_INIT(CMorseDlg)
	m_strText = _T("");
    m_strMorse = _T("");
	m_strDelay = _T("0.05");
	m_strLong = _T("0.1");
	m_strShort = _T("0.04");
	m_strFreq = _T("1000");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMorseDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(CMorseDlg)
	DDX_Text(pDX, IDC_EDIT1, m_strText);
    DDX_Text(pDX, IDC_EDIT2, m_strMorse);
	DDX_Text(pDX, IDC_DELAY, m_strDelay);
	DDX_Text(pDX, IDC_LONG, m_strLong);
	DDX_Text(pDX, IDC_SHORT, m_strShort);
	DDX_Text(pDX, IDC_FREQ, m_strFreq);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMorseDlg, CDialog)
    //{{AFX_MSG_MAP(CMorseDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	//}}AFX_MSG_MAP
    ON_REGISTERED_MESSAGE(CMorseParser::WM_WORK_FINISHED, OnMorseWorkFinished)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMorseDlg message handlers

BOOL CMorseDlg::OnInitDialog()
{
	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 CMorseDlg::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 CMorseDlg::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 CMorseDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMorseDlg::OnOK()
{
	UpdateData();
    m_strMorse = m_parser.Parse(m_strText);
	m_parser.m_dDelay = atof(m_strDelay);
	m_parser.m_dShort = atof(m_strShort);
	m_parser.m_dLong = atof(m_strLong);
	m_parser.m_lFreq = atol(m_strFreq);
	m_parser.m_hWnd = GetSafeHwnd();
	GetDlgItem(IDOK)->EnableWindow(FALSE);
    m_parser.AddParsedBufferToStreamAsync(m_strMorse);
	UpdateData(FALSE);
	// CDialog::OnOK();
}

LRESULT CMorseDlg::OnMorseWorkFinished(WPARAM w, LPARAM l)
{
	GetDlgItem(IDOK)->EnableWindow();
	return 0;
}

void CMorseDlg::OnButton1()
{
	CAboutDlg dlgAbout;
	dlgAbout.DoModal();
}