获取当前系统版本

#define SYSTEM_VERSION_REG_KEY      "SOFTWARE//Microsoft//Windows NT//CurrentVersion"

#define SYSTEM_CURRENT_VER_VAR      "CurrentVersion"

 

     HKEY hKey;
 LONG lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, SYSTEM_VERSION_REG_KEY, 0, KEY_READ, &hKey );
 DWORD dwBufSize = MAX_PATH;
 
 //get value for product name
 UCHAR szAppPath[MAX_PATH] = {0};
RegQueryValueEx(hKey, SYSTEM_CURRENT_VER_VAR, NULL, NULL,
  szAppPath, &dwBufSize)
   RegCloseKey(hKey);