[DllImport("kernel32.dll", EntryPoint = "LoadLibrary", ExactSpelling = false, CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr LoadLibrary(String lpFileName);

        [DllImport("kernel32.dll", EntryPoint = "LoadLibrary", ExactSpelling = false, CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr GetProcAddress(IntPtr hModule, string lpProcName);

        [DllImport("kernel32.dll", EntryPoint = "FreeLibrary", ExactSpelling = false, CallingConvention = CallingConvention.Cdecl)]
        public static extern bool FreeLibrary(IntPtr hModule);

        private void button1_Click(object sender, EventArgs e)
        {
            IntPtr farProc = GetProcAddress(LoadLibrary("User32.dll"), "MessageBox");
           MessageBox.Show(farProc.ToString());
        }
奇怪为什么的不到messagebox的地址呢?

LoadLibrary("User32.dll")是可以正常可以获取的，可GetProcAddress去返回0，为什么呢？

[课程]Android-CTF解题方法汇总！