今天为了写一个系统管理的小工具，参照Borland C++ Builder 的TRegistry 的接口,写了个CRegistry类. 目前只实现了ReadString() 方法，用来读取Windows 注册表中的 REG_SZ 项的值. 也没有进行错误处理。我想以后再慢慢的完善改进吧。
/**//*
*Filename: Registry.h
*Created By: bob.liu
*Create Date: 2007.2.24
*/
#pragma once
class CRegistry
...{
public:
CRegistry(DWORD Access=KEY_READ);
~CRegistry(void);
BOOL OpenKey(LPCTSTR Key, BOOL CanCreate=false);
void CloseKey(void);
LPTSTR ReadString(LPCTSTR lpValueName);
public:
DWORD m_wAccess;
HKEY m_hCurrentKey;
LPCTSTR m_CurrentPath; //if this doesn't work, a CString will be used
HKEY m_hRootKey;
/**//*
TRegistry properties
Access
CurrentKey
CurrentPath
LazyWrite
RootKey
*/
};
/**//*
*Filename: Registry.cpp
*Created By: bob.liu
*Create Date: 2007.2.24
*/
#include "StdAfx.h"
#include ". egistry.h"
CRegistry::CRegistry(DWORD Access)
...{
m_wAccess = Access;
}
CRegistry::~CRegistry(void)
...{
RegCloseKey(m_hCurrentKey);
TRACE("%s ",m_CurrentPath);
}
void CRegistry::CloseKey(void)
...{
RegCloseKey(m_hCurrentKey);
}
BOOL CRegistry::OpenKey(LPCTSTR szSubKey, BOOL CanCreate)
...{
RegOpenKeyEx(m_hRootKey, //hKey
szSubKey, //subkey
0, //options,reserved, must be 0
m_wAccess, //samDesired
&m_hCurrentKey); //phkResult
m_CurrentPath = szSubKey;
return TRUE;
}
LPTSTR CRegistry::ReadString(LPCTSTR lpValueName)
...{
LONG lRet;
DWORD dwType;
DWORD dwCount;
LPBYTE lpData = NULL;
lRet = RegQueryValueEx(
m_hCurrentKey, //hKey, root key
lpValueName,
NULL, //lpReserved
&dwType, //LPDWORD lpType,
lpData,
&dwCount //LPDWORD lpcbData
);
if(ERROR_SUCCESS == lRet)
...{
lpData = new BYTE[dwCount];
lRet = RegQueryValueEx(
m_hCurrentKey, //hKey, root key
lpValueName,
NULL, //lpReserved
&dwType, //LPDWORD lpType,
lpData,
&dwCount //LPDWORD lpcbData
);
}
return (LPTSTR) lpData; //it's caller's responsibility to delete this memory
}
/**//* *Filename: Registry.h *Created By: bob.liu *Create Date: 2007.2.24 */#pragma onceclass CRegistry...{public: CRegistry(DWORD Access=KEY_READ); ~CRegistry(void); BOOL OpenKey(LPCTSTR Key, BOOL CanCreate=false); void CloseKey(void); LPTSTR ReadString(LPCTSTR lpValueName);public: DWORD m_wAccess; HKEY m_hCurrentKey; LPCTSTR m_CurrentPath; //if this doesn't work, a CString will be used HKEY m_hRootKey; /**//* TRegistry properties Access CurrentKey CurrentPath LazyWrite RootKey */};
/**//* *Filename: Registry.cpp *Created By: bob.liu *Create Date: 2007.2.24 */#include "StdAfx.h"#include ". egistry.h"CRegistry::CRegistry(DWORD Access)...{ m_wAccess = Access;}CRegistry::~CRegistry(void)...{ RegCloseKey(m_hCurrentKey); TRACE("%s ",m_CurrentPath);}void CRegistry::CloseKey(void)...{ RegCloseKey(m_hCurrentKey);}BOOL CRegistry::OpenKey(LPCTSTR szSubKey, BOOL CanCreate)...{ RegOpenKeyEx(m_hRootKey, //hKey szSubKey, //subkey 0, //options,reserved, must be 0 m_wAccess, //samDesired &m_hCurrentKey); //phkResult m_CurrentPath = szSubKey; return TRUE;}LPTSTR CRegistry::ReadString(LPCTSTR lpValueName)...{ LONG lRet; DWORD dwType; DWORD dwCount; LPBYTE lpData = NULL; lRet = RegQueryValueEx( m_hCurrentKey, //hKey, root key lpValueName, NULL, //lpReserved &dwType, //LPDWORD lpType, lpData, &dwCount //LPDWORD lpcbData ); if(ERROR_SUCCESS == lRet) ...{ lpData = new BYTE[dwCount]; lRet = RegQueryValueEx( m_hCurrentKey, //hKey, root key lpValueName, NULL, //lpReserved &dwType, //LPDWORD lpType, lpData, &dwCount //LPDWORD lpcbData ); } return (LPTSTR) lpData; //it's caller's responsibility to delete this memory}