完整解决:
[DllImport("xxxx.dll", CharSet=CharSet.Ansi)]
public static extern bool SetIPAddress(string lpszIPAddress, int dwPortNumber, int dwPassWord);
有个问题注意:
WordBool对应的具体是什么类型,如果是int的话:
[DllImport("xxxx.dll", CharSet=CharSet.Ansi)]
public static extern int SetIPAddress(string lpszIPAddress, int dwPortNumber, int dwPassWord);