vb实现屏蔽U口，通过修改注册表来完成，屏蔽U口后,不会影响到打印机或其他设备，解除屏蔽需输入管理员密码，代码内的注册表操作类，会因不同类型,读写方法有一定区别，包括有注册表 Api 常数，注册表关键字安全选项，写注册表，创建/打开注册表关键字，从登录关键字中删除一个值等功能-vb achieve shielding U port, modify the registry to complete, after shielding U mouth, does not affect the printer or other device, unmasked need to enter the administrator password, registry operations within the code, due to different types of reading and writing methods have some differences, including the registry Api constant, registry key security options, write the registry, create/open registry key, delete the value from the registry key in a function