You can use the extended stored procedure dll wizard to generate a win32 dll project , with the proper initialization code , that contains one exported function 可以通过“扩展存储过程dll向导” ，用适当的初始化代码生成包含一个导出函数的win32 dll项目。
Compiland , ensure that the declarations of each type in the signature are identical to those in the compiland that exports the function being especially careful about differences in implicit calling conventions Compiland中时，请确保签名中每种类型的声明都与导出函数的compiland中的声明相同（应特别注意隐式调用约定中的差异） 。
Platform invoke locates and calls unmanaged code as an exported function . it also marshals the call s arguments , such as input and output parameters , integers , strings , arrays , and structures , as needed 平台调用将非托管代码作为导出函数进行定位和调用。它还根据需要封送调用的参数，如输入和输出参数、整型、字符串、数组和结构等。
The read and write functions are programmed using dll technics to simplify the operation of device . finally , an application to communicate with the device is designed in visual basic by calling the read and write functions exported in dll 然后，使用动态链接库dll技术编写了设备的读写函数，方便仪表作为外围设备的操作，论文最后使用visualbasic语言编写了一个操作仪表设备的应用程序，通过调用动态链接库中的导出函数来完成仪表操作。
