实现winform 代码导入dll

代码如下：

        [DllImport("kernel32.dll", EntryPoint = "LoadLibrary")]        public static extern IntPtr LoadLibrary(string sLibName);        [DllImport("kernel32.dll", EntryPoint = "FreeLibrary")]        public static extern int FreeLibrary(string sLibName);IntPtr hDll = LoadLibrary("××.DLL");            if (hDll == IntPtr.Zero)            {                MessageBox.Show("Can't load library!");                return false;            }