Window Registry with Time Stamp

[Vijay Patel]

I have buiild software with 30 days trial.

After 30 days enduser(or Client) will call to obtain key code and reactivate the software and code I have worked with is as follow:
SetAvailability();

COleDateTime timeStart;
// COleDateTime timeEnd(30.0);
COleDateTimeSpan timePassed;


int daysLeft = 0;

HKEY hk;
DWORD dwDisp;

// Open the Registry key, if it doesn't exist, it will be created.
RegCreateKeyEx(HKEY_LOCAL_MACHINE,
"SOFTWARE\\AVTRON MANUFACTURING\\ADDAPT\\DON\\ADDAPT",
0,
NULL,
REG_OPTION_NON_VOLATILE,
KEY_WRITE | KEY_READ,
NULL,
&hk,
&dwDisp);

// Check to see if the install date has been set in the registry entry. If it doesn't exist, create
// the registry entry.

int iRetVal = RegQueryValueEx(hk,
"USR:App Name\\Section1",
NULL,
NULL,
NULL,
NULL);

COleDateTime currDateTime = COleDateTime::GetCurrentTime();

if(iRetVal != ERROR_SUCCESS)
{
// Registry entry doesn't exist, create it, and set to the current date.
RegSetValueEx(hk,
"USR:App Name\\Section1",
0,
REG_DWORD,
(LPBYTE) &currDateTime,
sizeof(currDateTime));
}

timeStart = COleDateTime::GetCurrentTime(); // Date and time of the installation.

DWORD cbData = sizeof(timeStart);
RegQueryValueEx(hk,
"USR:App Name\\Section1",
NULL,
NULL,
(LPBYTE)&timeStart,
&cbData);

timePassed = COleDateTime::GetCurrentTime() - timeStart;
daysLeft = 30 - static_cast(timePassed.GetTotalDays());

CString strMessage;

if (daysLeft <= 0)
{
strMessage.Format("ADDapt was not activated within 30 days of \n"
"installation, and will currently not function. \n"
"To activate, please call Avtron Field Service \n"
"at 216-642-1230 ext 1214.\n"
"The %d days trial period started on the day you installed ADDapt.\n"
"The application will now close.", daysLeft);

//AfxMessageBox(strMessage, MB_OK | MB_ICONSTOP);



CProductCodeDlg dlg;
dlg.DoModal();
// User selected No, close the application.
return FALSE;
}
else
{
strMessage.Format(_T("ADDapt is operating under a trial license. \n")
_T("You have %d" " days to activate ADDapt with a valid license.\n")
_T("To activate, Please call Avtron Field Service at 216 642-1230 ext 1214. \n")
_T("Do you want to Proceed?"), daysLeft);

int iRespVal = AfxMessageBox(strMessage, MB_YESNO | MB_ICONEXCLAMATION);

// User selected No, close the application.
if(iRespVal == IDNO)
return FALSE;
}



*****************************************************************************************



//ProductCode.CPP



// ProductCode.cpp : implementation file
//

#include "stdafx.h"
#include "Parameters.h"
#include "AddaptApp.h"

#include "ProductCode.h"

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

const DWORD CONFUSER = 32767;
/////////////////////////////////////////////////////////////////////////////
// CProductCodeDlg dialog
CProductCodeDlg::CProductCodeDlg(CWnd* pParent) : CDialog(CProductCodeDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CChange)
m_strAddapt98 = _T("Activation Required");
m_strSA = _T("Purchase Required");
m_strViewer = _T("Purchase Required");
m_dwSerialNum = 0;
m_dwProductCode = 0;
//}}AFX_DATA_INIT
}

/////////////////////////////////////////////////////////////////////////////
// CProductCodeDlg dialog
void CProductCodeDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CProductCodeDlg)
DDX_Text(pDX, IDC_ADDAPT98, m_strAddapt98);
DDX_Text(pDX, IDC_RTD, m_strSA);
DDX_Text(pDX, IDC_VIEWER, m_strViewer);
DDX_Text(pDX, IDC_PRODUCTCODE, m_dwProductCode);
DDX_Text(pDX, IDC_SERIALNUM, m_dwSerialNum);
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CProductCodeDlg, CDialog)
//{{AFX_MSG_MAP(CProductCodeDlg)
ON_EN_CHANGE(IDC_PRODUCTCODE, OnProductCodeEntry)
ON_BN_CLICKED(ID_DONE, OnDone)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CProductCodeDlg message handlers
BOOL CProductCodeDlg::OnInitDialog()
{
CDialog::OnInitDialog();

CAddaptApp* pAddaptApp = (CAddaptApp*)AfxGetApp();
m_dwSerialNum = pAddaptApp->m_dwSerialNum;
m_dwProductCode = pAddaptApp->m_dwProductCode;
m_dwInitialCode = m_dwProductCode;

BOOL bDisableEntry = FALSE;

if (pAddaptApp->m_bSA_Available)
m_strSA = "Available";

if (pAddaptApp->m_bViewer_Available)
m_strViewer = "Available";

if (pAddaptApp->m_bProductCodeFound)
{
m_strAddapt98 = "Available";

if( pAddaptApp->m_bViewer_Available )
bDisableEntry = TRUE; // all options are available - good customer
} // dont let anyone screw things up
else
{
if (m_dwProductCode == 0)
m_strAddapt98 = "Activation Required";
else
m_strAddapt98 = "Product Code Invalid";

m_strSA = "Purchase Required";
m_strViewer = "Purchase Required";


}

CWnd* pWnd = GetDlgItem(IDC_PRODUCTCODE);
if(bDisableEntry)
pWnd->EnableWindow(FALSE);
else
pWnd->EnableWindow(TRUE);

UpdateData(FALSE);
return TRUE;
}

void CProductCodeDlg::OnProductCodeEntry()
{
UpdateData(TRUE);
}

void CProductCodeDlg::OnOK()
{ // update controls
UpdateData(TRUE);

CAddaptApp* pApp = (CAddaptApp*)AfxGetApp();
DWORD num = (m_dwProductCode & 0x02e0);

if( (m_dwProductCode == 0x02e0 && pApp->m_bBeta) ||
m_dwProductCode != m_dwInitialCode &&
m_dwProductCode >= ( (m_dwSerialNum + 1001000) & 0xfff1f) &&
m_dwProductCode <= ( ((m_dwSerialNum + 1001000) & 0xfff1f) + 225) )
{

CParameters::ProductCode(num);
pApp->SetAvailability();

if (pApp->m_bProductCodeFound)
m_strAddapt98 = "Activation Required";

if (pApp->m_bSA_Available)
m_strSA = "Available";

if (pApp->m_bViewer_Available)
m_strViewer = "Available";


UpdateData(FALSE);
}
}

void CProductCodeDlg::OnDone()
{
UpdateData(TRUE);

//CAddaptApp* pApp = (CAddaptApp*)AfxGetApp();
DWORD num = (m_dwProductCode & 0x02e0);

/*if( m_dwProductCode != m_dwInitialCode &&
m_dwProductCode >= ( (m_dwSerialNum + 1001000) & 0xffc1f) &&
m_dwProductCode <= ( ((m_dwSerialNum + 1001000) & 0xffc1f) + 0x02e0))*/

if( (m_dwProductCode == 0x02e0 ) ||
m_dwProductCode != m_dwInitialCode &&
m_dwProductCode >= ( (m_dwSerialNum + 1001000) & 0xfff1f) &&
m_dwProductCode <= ( ((m_dwSerialNum + 1001000) & 0xfff1f) + 225) )
{
CParameters::ProductCode(num);
((CAddaptApp*)AfxGetApp())->SetAvailability();
}

CDialog::OnOK();
}

void CProductCodeDlg::OnCancel()
{
CDialog::OnCancel();
}


*************************************************************

What I am trying to do here once the product code insert in PROCUDTCODE FORM it will mentioned that it is AVAILABLE and MAIN MANU FORM will pop and application remains working.