gistfile1.cs

...
    private static void BindNative(IntPtr functionPtr, String name, String prototype)
    {
        // Manual implementation of __fastcall.
        // Moves the two first arguments to the registers, and pushes the rest on the stack.

        var code = new byte[32];
        var stream = new MemoryStream(code);
        var writer = new BinaryWriter(stream);

        var codePtr = Kernel32.VirtualAlloc(IntPtr.Zero, code.Length, AllocationType.Commit, MemoryProtection.ExecuteReadWrite);
        var namePtr = Marshal.StringToHGlobalAnsi(name);
        var prototypePtr = Marshal.StringToHGlobalAnsi(prototype);

        // (68) push, prototype string pointer
        writer.Write((Byte)0x68);
        writer.Write((UInt32)prototypePtr);

        // (BA) mov edx, name string pointer
        writer.Write((Byte)0xBA);
        writer.Write((UInt32)namePtr);

        // (B9) mov ecx, function pointer
        writer.Write((Byte)0xB9);
        writer.Write((UInt32)functionPtr);

        // (E8) call, BindNative relative offset
        writer.Write((Byte)0xE8);
        writer.Write((UInt32)((Int32)Addresses.BindNative - (Int32)codePtr - (Int32)writer.BaseStream.Position - 4));

        // (C3) retn
        writer.Write((Byte)0xC3);

        Marshal.Copy(code, 0, codePtr, code.Length);

        ((EmptyBindNativePrototype)Marshal.GetDelegateForFunctionPointer(codePtr, typeof(EmptyBindNativePrototype)))();

        Kernel32.VirtualFree(codePtr, code.Length, 0x8000);
    }
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