c++读取注册表详解

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// 读取注册表CString ReadRegisteTable(CString root,CString path, CString key){HKEY hAppKey;LPCTSTR WINDS_SERVICE_REGISTRY_KEY=path;LPCTSTR DATA_FILE_SUB_KEY=key;char szDataFile[80];if(root=="HKEY_LOCAL_MACHINE"){if(ERROR_SUCCESS==RegOpenKeyEx(HKEY_LOCAL_MACHINE,WINDS_SERVICE_REGISTRY_KEY,0,KEY_READ,&hAppKey)){ULONG cbSize = MAX_PATH*sizeof(TCHAR);DWORD dwFlag = RegQueryValueEx (hAppKey,DATA_FILE_SUB_KEY,NULL,NULL,(LPBYTE)szDataFile,&cbSize);RegCloseKey (hAppKey);if (ERROR_SUCCESS == dwFlag){CString strDate=szDataFile; //MessageBox(strDate);if(strDate.GetLength()>0) return strDate;else return "";}return "";}}if(root=="HKEY_CURRENT_USER"){if (ERROR_SUCCESS == RegOpenKeyEx (HKEY_CURRENT_USER,WINDS_SERVICE_REGISTRY_KEY0,KEY_READ,&hAppKey)){ULONG cbSize = MAX_PATH*sizeof(TCHAR);DWORD dwFlag = RegQueryValueEx (hAppKey,DATA_FILE_SUB_KEY,NULL,NULL,(LPBYTE)szDataFile,&cbSize);RegCloseKey (hAppKey);if (ERROR_SUCCESS == dwFlag){CString strDate=szDataFile; //MessageBox(strDate);if(strDate.GetLength()>0) return strDate;else return "";}return "";}}return "";}

BOOL ModifyRegisteTable(CString root,CString path, CString key, CString value){HKEY hAppKey;DWORD dwDisposition = MAX_PATH*sizeof(TCHAR);LPCTSTR WINDS_SERVICE_REGISTRY_KEY=path;LPCTSTR DATA_FILE_SUB_KEY=key;char szDataFile[80]; strcpy(szDataFile,value);if(root=="HKEY_LOCAL_MACHINE"){if (ERROR_SUCCESS != RegCreateKeyEx (HKEY_LOCAL_MACHINE,WINDS_SERVICE_REGISTRY_KEY,0,NULL,REG_OPTION_NON_VOLATILE,KEY_WRITE,NULL,&hAppKey,&dwDisposition)){return false;}else{if (ERROR_SUCCESS != RegSetValueEx (hAppKey,DATA_FILE_SUB_KEY,0,REG_SZ,(LPBYTE)szDataFile,(lstrlen (szDataFile)+1)*sizeof(TCHAR))){return false;}RegCloseKey (hAppKey);}}if(root=="HKEY_CURRENT_USER"){if (ERROR_SUCCESS != RegCreateKeyEx (HKEY_CURRENT_USER,WINDS_SERVICE_REGISTRY_KEY,0,NULL,REG_OPTION_NON_VOLATILE,KEY_WRITE,NULL,&hAppKey,&dwDisposition)){return false;}else{if (ERROR_SUCCESS != RegSetValueEx (hAppKey,DATA_FILE_SUB_KEY,0,REG_SZ,(LPBYTE)szDataFile,(lstrlen (szDataFile)+1)*sizeof(TCHAR))){return false;}RegCloseKey (hAppKey);}}return true;}

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