VC读写注册表
| 读写注册表 |
| 2003-11-3加入 来自未知 作者佚名 7条评论 点击12953次 |
| Win 95及NT的注册数据库(Registry)是系统中非常重要的组成部分。在Win32 API中有一组Reg函数来处理这些问题。其一般的读写过程如下： 1、使用RegOpenKeyEx或RegCreateKeyEx函数打开或创建一个键； 2、如果上一步成功，使用RegQueryValueEx读取子键的值，使用RegSetValueEx设置子键值，使用RegEnumKey获得所有子键，使用RegDeleteKey删除一个键； 3、完成操作后使用RegCloseKey关闭键。 下面这段程序打开HKEY_CURRENT_USER\Software\Zeal SoftStudio\AskPro FTP\LastTime键，然后读取WOL子键的值。 HKEY hkey; char sz[256]; DWORD dwtype, sl = 256; RegOpenKeyEx(HKEY_CURRENT_USER, "Software\\Zeal SoftStudio\\AskPro FTP\\LastTime", NULL, KEY_ALL_ACCESS, &hkey); RegQueryValueEx(hkey, "WOL", NULL, &dwtype, (LPBYTE)sz, &sl); RegCloseKey(hkey); MFC程序可以使用CRegKey类读写注册表。VB中调用API的办法可以参考QA000226 "如何访问Windows系统注册表"。 打开注册键 LONG RegOpenKeyEx( HKEY hKey, // handle to open key LPCTSTR lpSubKey, // address of name of subkey to open DWORD ulOptions, // reserved =0 REGSAM samDesired, // security access mask PHKEY phkResult // address of handle to open key ); 例: HKEY hd; hd=HKEY_LOCAL_MACHINE; char* Regkeyname="SoftWare\\Xy123\\Poker\\"; LONG a=RegOpenKeyEx(hd,Regkeyname,0,KEY_READ,&hd); //成功返回ERROR_SUCCESS,否则返回错误代码 关闭注册键 LONG RegCloseKey( HKEY hKey // handle to key to close ); 例: RegCloseKey(HKEY_LOCAL_MACHINE); OR: RegCloseKey(hd); 建立注册键 LONG RegCreateKeyEx( HKEY hKey, // handle to an open key LPCTSTR lpSubKey, // address of subkey name DWORD Reserved, // reserved =0 LPTSTR lpClass, // address of class string DWORD dwOptions, // special options flag REGSAM samDesired, // desired security access LPSECURITY_ATTRIBUTES lpSecurityAttributes, // address of key security structure PHKEY phkResult, // address of buffer for opened handle LPDWORD lpdwDisposition // address of disposition value buffer ); 例: char *sclass=""; //类名指定为空 DWORD nbf=0; //接受返回值,指明是建立新键还是打开已有的键.(经试验总是返回REG_OPENED_EXISTING_KEY. LONG II=RegCreateKeyEx(hd,Regkeyname,0,sclass,REG_OPTION_NON_VOLATILE, KEY_READ|KEY_WRITE,NULL,&hd,&nbf); //REG_OPTION_NON_VOLATILE 指明键永久保留.安全结构指明NULL,自动获得一默认值 //成功返回ERROR_SUCCESS,否则返回错误代码 枚举键值 LONG RegEnumValue( HKEY hKey, // handle to key to query DWORD dwIndex, // index of value to query LPTSTR lpValueName, // address of buffer for value string LPDWORD lpcbValueName, // address for size of value buffer LPDWORD lpReserved, // reserved =NULL LPDWORD lpType, // address of buffer for type code LPBYTE lpData, // address of buffer for value data LPDWORD lpcbData // address for size of data buffer); 例: DWORD dinx=0; char valuename[70]; //分配数值名称缓冲区 strcpy(valuename,"DeskPattern"); //随便指定哪个键值名 DWORD nsize=69; //数值名称缓冲区大小 DWORD k=REG_SZ; //指明数据类型 unsigned char vari[70]; //分配数值缓冲区 DWORD ncbvari=69; //数值缓冲区大小 dinx=0; //从0开始 while((II=RegEnumValue(hd,dinx,valuename,&nsize,NULL,&k,vari,&ncbvari)) != ERROR_NO_MORE_ITEMS) { dinx++;//索引 +1,准备取下一个值 nsize=69; //恢复原来大小 ncbvari=69; } 成功后返回值0,各变量返回后设置如下: valuename=数值名称,以0结尾;如 : DeskColor nsize=数值名称长度, 9 k=REG_SZ DeskColor 的类型为 REG_SZ vari=键值,32768 DeskColor="32768", ncbvari=键值长度 REG_SZ包括结尾0,=6, 读取键值 LONG RegQueryValueEx( HKEY hKey, // handle to key to query LPTSTR lpValueName, // address of name of value to query LPDWORD lpReserved, // reserved LPDWORD lpType, // address of buffer for value type LPBYTE lpData, // address of data buffer LPDWORD lpcbData // address of data buffer size ); 例: RegQueryValueEx(hd,valuename,NULL,&k,vari,&ncbvari); 变量定义及成功后各变量设置值同RegEnumValueEx 写键值 LONG RegSetValueEx( HKEY hKey, // handle to key to set value for LPCTSTR lpValueName, // name of the value to set DWORD Reserved, // reserved DWORD dwType, // flag for value type CONST BYTE *lpData, // address of value data DWORD cbData // size of value data ); 例: strcpy(valuename,"Hello"); unsigned char vari[10]; DWORD k=REG_SZ; strcpy((char*)vari,"1234567") RegSetValueEx(hd,valuename,0,k,vari,7); 成功后在Poker下增加一个键值 Hello : REG_SZ : 1234567 写整型变量： int hi=8; RegSetValueEx(pj,valuename,0,REG_BINARY,(unsigned char*)&hi,sizeof(int)); 成功后在Poker下增加一个键值 Hello2 : REG_BINARY :08 00 00 00 void AddEventSource() { HKEY hk; DWORD dwData; UCHAR szBuf[80]; // Add your source name as a subkey under the Application // key in the EventLog registry key. if (RegCreateKey(HKEY_LOCAL_MACHINE, "SYSTEM\\CurrentControlSet\\Services\ \\EventLog\\Application\\SamplApp", &hk)) ErrorExit("Could not create the registry key."); // Set the name of the message file. strcpy(szBuf, "%SystemRoot%\\System\\SamplApp.dll"); // Add the name to the EventMessageFile subkey. if (RegSetValueEx(hk, // subkey handle "EventMessageFile", // value name 0, // must be zero REG_EXPAND_SZ, // value type (LPBYTE) szBuf, // pointer to value data strlen(szBuf) + 1)) // length of value data ErrorExit("Could not set the event message file."); // Set the supported event types in the TypesSupported subkey. dwData = EVENTLOG_ERROR_TYPE | EVENTLOG_WARNING_TYPE | EVENTLOG_INFORMATION_TYPE; if (RegSetValueEx(hk, // subkey handle "TypesSupported", // value name 0, // must be zero REG_DWORD, // value type (LPBYTE) &dwData, // pointer to value data sizeof(DWORD))) // length of value data ErrorExit("Could not set the supported types."); RegCloseKey(hk); } 以下代码把注册表自启动shell的键值改写为C:\DK1\ATM\HARP\ExAtmShell.exe: HKEY hkey; LONG res; DWORD datatype=REG_SZ; unsigned char szvalue[_MAX_PATH]; strcpy((char*)szvalue,"C:\\DK1\\ATM\\HARP\\ExAtmShell.exe"); res =::RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\", 0, KEY_WRITE|KEY_READ, &hkey); if(res!=ERROR_SUCCESS) { AfxMessageBox("aaa"); return; } res = ::RegSetValueEx(hkey, "Shell", 0, datatype, szvalue, strlen(LPCSTR(szvalue))); RegCloseKey(hkey); if(res==ERROR_SUCCESS) ::AfxMessageBox("你已经成功地将注册表自启动shell的键值设置为C:\\DK1\\ATM\\HARP\\ExAtmShell.exe"); else ::AfxMessageBox("设定失败:目标位置不存在这样的键!"); |
