newprocdlg.cpp

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// NewProcDlg.cpp : implementation file
//

#include "stdafx.h"
#include "NewProc.h"
#include "NewProcDlg.h"
#include	<process.h>

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

/////////////////////////////////////////////////////////////////////////////
// CNewProcDlg dialog

CNewProcDlg::CNewProcDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CNewProcDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CNewProcDlg)
		// 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);
	memset (&m_pi, '\0', sizeof (PROCESS_INFORMATION));
}

void CNewProcDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CNewProcDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CNewProcDlg, CDialog)
	//{{AFX_MSG_MAP(CNewProcDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_CREATEPROCESS, OnCreateprocess)
	ON_BN_CLICKED(IDC_EXECNOTEPAD, OnExecnotepad)
	ON_BN_CLICKED(IDC_SPAWNNOTEPAD, OnSpawnnotepad)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CNewProcDlg message handlers

BOOL CNewProcDlg::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
}

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

void CNewProcDlg::OnCreateprocess() 
{
STARTUPINFO			si;
static PROCESS_INFORMATION	pi;

	if (pi.dwProcessId)
	{
		DWORD dwCode;
		GetExitCodeProcess ((HANDLE) pi.hProcess, &dwCode);
		if (dwCode == STILL_ACTIVE)
		{
			AfxMessageBox ("Another copy of NotePad.exe has been"
							" started by CreateProcess\n"
							"It will be stopped first.");
//			TerminateProcess (pi.hProcess, 0);
			PostThreadMessage (pi.dwThreadId, WM_QUIT, 0, 0);
		}
	}
	memset ((char *) &si, '\0', sizeof (STARTUPINFO));
	si.cb = sizeof (STARTUPINFO);
	TCHAR szDir[_MAX_PATH];
	GetWindowsDirectory (szDir, _MAX_PATH);
	CString strProgPath, strProgParms;
	strProgPath.Format ("%s\\NotePad.exe", szDir);
	GetCurrentDirectory (_MAX_PATH, szDir);
	strProgParms.Format ("notepad %s\\readme.txt", szDir);
	if (!CreateProcess((LPCTSTR) strProgPath,
				(char *)(LPCSTR) strProgParms, 
				(LPSECURITY_ATTRIBUTES) NULL,
				(LPSECURITY_ATTRIBUTES) NULL,
				false,
				DETACHED_PROCESS,
				(LPVOID) NULL,
				szDir,
				(LPSTARTUPINFO) &si,
				(LPPROCESS_INFORMATION) &pi))
	{
		AfxMessageBox ("CreateProcess failed", MB_ICONSTOP);
	}
}

void CNewProcDlg::OnExecnotepad() 
{
	if (AfxMessageBox ("This will terminate your application.\n"
						"Do you want to continue?", MB_YESNO) == IDNO)
		return;
	if (_execlp ("NotePad", "NotePad.Exe", "readme.txt", NULL) < 0)
	{
		CString Message;
		Message.Format ("Error %d exec'ing process", errno);
		AfxMessageBox (Message);
	}
}

void CNewProcDlg::OnSpawnnotepad() 
{
	static int nPID = 0;
	CString Message;
	if (nPID)
	{
		DWORD dwCode;
		GetExitCodeProcess ((HANDLE) nPID, &dwCode);
		if (dwCode == STILL_ACTIVE)
		{
			switch (AfxMessageBox ("Another copy of NotePad has been started by spawn\n"
							   "and will be terminated. Do you want to continue?",
							   MB_YESNO))
			{
				case IDNO:
					return;
				case IDYES:
//					TerminateProcess ((HANDLE) nPID, 0);
					::SendMessage ((HWND) nPID, WM_QUIT, 0, 0);
					break;
				default:
					return;
			}
		}
	}
	nPID = _spawnlp (_P_NOWAIT, "NotePad", "NotePad.Exe", "readme.txt", NULL);
	if (nPID < 0)
	{
		CString Message;
		Message.Format ("Error %d exec'ing process", errno);
		AfxMessageBox (Message);
		nPID = 0;
	}
}