在哪里可以找到解释如何使用C / C ++函数头并在C＃中使用dllimport定义它的参考？

I am using setupapi.dll to determine USB device connectivity. It isn't working properly in 64 bit versions of windows (XP, Vista). I suspect that the declarations are not quite correct, but am not sure how to verify. MS doesn't seem to provide the dllimport information, but they do list all the function definitions. Is there a resource I can use to convert between the function header and the dllimport declaration?I am using setupapi.dll to determine USB device