C#加载非.net的DLL

1.静态加载

[DLLImport("DLLName","FunctionName")
 public static extern void FunctionName(参数定义)

2.动态加载

　　单独用一个工具类提供DLL动态加载帮助

        public class DllInvoke
        {
            [DllImport("kernel32.dll")]
            private extern static IntPtr LoadLibrary(string path);
            [DllImport("kernel32.dll")]
            private extern static IntPtr GetProcAddress(IntPtr lib, string funcName);
            [DllImport("kernel32.dll")]
            private extern static bool FreeLibrary(IntPtr lib);

            private IntPtr hLib;
            public DllInvoke(String DLLPath)
            {
                hLib = LoadLibrary(DLLPath);
            }
            ~DllInvoke()
            {
                FreeLibrary(hLib);
            }
            //将要执行的函数转换为委托
            public Delegate Invoke(string APIName, Type t)
            {
　　　　　　　　　 if(hLib==0) return null;
                IntPtr api = GetProcAddress(hLib, APIName);
                return (Delegate)Marshal.GetDelegateForFunctionPointer(api, t);
            }
        }   

使用：

 public delegate bool Function(参数定义);


 DllInvoke dll = new DllInvoke(strSeedKeyPath);
 Function func= (Seed2key)dll.Invoke("seed2Key", typeof(Seed2key));

 func(参数);