limitusetime.cpp

VisualC高级编程技术精粹.rar

// LimitUseTime.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "LimitUseTime.h"
#include "LimitUseTimeDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CLimitUseTimeApp

BEGIN_MESSAGE_MAP(CLimitUseTimeApp, CWinApp)
	//{{AFX_MSG_MAP(CLimitUseTimeApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG
	ON_COMMAND(ID_HELP, CWinApp::OnHelp)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CLimitUseTimeApp construction

CLimitUseTimeApp::CLimitUseTimeApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CLimitUseTimeApp object

CLimitUseTimeApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CLimitUseTimeApp initialization

BOOL CLimitUseTimeApp::InitInstance()
{
	AfxEnableControlContainer();

	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif

	unsigned char buffer[255]={0};
	unsigned long length;
	unsigned long type;
	HKEY hKey;
	
	RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\dm",&hKey); //打开键
	RegQueryValueEx(hKey,"Num",NULL,&type,buffer,&length);//读取键
	RegCloseKey(hKey);//关闭键

	int nCount = 0;
	nCount = atoi((const char*)buffer);
	if (nCount == 0) //用户第一次使用
	{
		RegCreateKey(HKEY_LOCAL_MACHINE,"SOFTWARE\\dm",&hKey);
		RegSetValueEx(hKey,"Num",0,REG_SZ,(const unsigned char *)"30",strlen("30"));
		RegCloseKey(hKey);
		MessageBox(NULL,_T("尊敬的用户，该软件属于测试版软件，你有30次免费使用的权限!"),_T("友情提示"),MB_OK);			
	}
	else if(nCount == 1) //系统提示用户已经没有免费使用的权限了
	{
		MessageBox(NULL,_T("尊敬的用户，该软件属于测试版软件，你已经没有免费使用的权限了，\r\n请先注册，然后再使用!"),_T("友情提示"),MB_OK);
		return true;
	}
	else  //用户使用本软件大于1次了，系统显示剩余的免费使用的次数
	{
		char buf[255]={0};
		nCount -= 1;
		itoa(nCount,buf,10);
		CString csTimeTip = _T("");
		csTimeTip.Format (_T("尊敬的用户，你还有%d次免费使用本软件的权限!"),nCount);
		MessageBox(NULL,csTimeTip,_T("友情提示"),MB_OK);
		RegOpenKey(HKEY_LOCAL_MACHINE,"SOFTWARE\\dm",&hKey);
		RegSetValueEx(hKey,"Num",0,REG_SZ,(const unsigned char*)buf,strlen(buf));
		RegCloseKey(hKey);
	}

	CLimitUseTimeDlg dlg;
	m_pMainWnd = &dlg;
	int nResponse = dlg.DoModal();
	if (nResponse == IDOK)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with OK
	}
	else if (nResponse == IDCANCEL)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with Cancel
	}

	// Since the dialog has been closed, return FALSE so that we exit the
	//  application, rather than start the application's message pump.
	return FALSE;
}