key.cpp

VC++写的仿Windows系统的写字板程序

// key.cpp : implementation file
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "stdafx.h"
#include "key.h"
#include <winreg.h>

#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CKey

void CKey::Close()
{
	if (m_hKey != NULL)
	{
		LONG lRes = RegCloseKey(m_hKey);
		ASSERT(lRes == ERROR_SUCCESS);
		m_hKey = NULL;
	}
}

BOOL CKey::Create(HKEY hKey, LPCTSTR lpszKeyName)
{
	ASSERT(hKey != NULL);
	return (RegCreateKey(hKey, lpszKeyName, &m_hKey) == ERROR_SUCCESS);
}

BOOL CKey::Open(HKEY hKey, LPCTSTR lpszKeyName)
{
	ASSERT(hKey != NULL);
	return (RegOpenKey(hKey, lpszKeyName, &m_hKey) == ERROR_SUCCESS);
}

BOOL CKey::SetStringValue(LPCTSTR lpszValue, LPCTSTR lpszValueName)
{
	ASSERT(m_hKey != NULL);
	return (RegSetValueEx(m_hKey, lpszValueName, NULL, REG_SZ,
		(BYTE * const)lpszValue, (lstrlen(lpszValue)+1)*sizeof(TCHAR)) == ERROR_SUCCESS);
}

BOOL CKey::GetStringValue(CString& str, LPCTSTR lpszValueName)
{
	ASSERT(m_hKey != NULL);
	str.Empty();
	DWORD dw = 0;
	DWORD dwType = 0;
	LONG lRes = RegQueryValueEx(m_hKey, (LPTSTR)lpszValueName, NULL, &dwType,
		NULL, &dw);
	if (lRes == ERROR_SUCCESS)
	{
		ASSERT(dwType == REG_SZ);
		LPTSTR lpsz = str.GetBufferSetLength(dw);
		lRes = RegQueryValueEx(m_hKey, (LPTSTR)lpszValueName, NULL, &dwType, (BYTE*)lpsz, &dw);
		ASSERT(lRes == ERROR_SUCCESS);
		str.ReleaseBuffer();
		return TRUE;
	}
	return FALSE;
}