gta natives SET_INPUT_EVENT_SELECT example

using System;
using System.Windows.Forms;
using GTA;
using GTA.Native;


public class ClickableInstuctionalButtons : Script
{
    private Scaleform scaleform = new Scaleform("instructional_buttons");
    private bool inputRequest;


    public ClickableInstuctionalButtons()
    {
        KeyUp += OnKeyUp;
        Interval = 5;
    }

    private void OnKeyUp(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.F7)
        {
            if (!inputRequest)
            {
                inputRequest = true;
                UpdateScaleform();
                Tick += InputRequestTick;
            }
        }
    }

    private void InputRequestTick(object sender, EventArgs e)
    {
        // enable mouse cursor so user can click on buttons
        Function.Call(Hash._SHOW_CURSOR_THIS_FRAME);
        Function.Call(Hash.DISABLE_ALL_CONTROL_ACTIONS, 0);
        // enable character/vehicle movement
        Function.Call(Hash.ENABLE_CONTROL_ACTION, 0, 30, 1);
        Function.Call(Hash.ENABLE_CONTROL_ACTION, 0, 31, 1);
        Function.Call(Hash.ENABLE_CONTROL_ACTION, 0, 59, 1);
        Function.Call(Hash.ENABLE_CONTROL_ACTION, 0, 60, 1);
        Function.Call(Hash.ENABLE_CONTROL_ACTION, 0, 71, 1);
        Function.Call(Hash.ENABLE_CONTROL_ACTION, 0, 72, 1);
        // enable pause menu
        Function.Call(Hash.ENABLE_CONTROL_ACTION, 2, 199, 1);
        Function.Call(Hash.ENABLE_CONTROL_ACTION, 2, 200, 1);
        // enable CursorAccept (left click) oherwise user can't click on buttons
        Function.Call(Hash.ENABLE_CONTROL_ACTION, 0, 237, 1);

        scaleform.Render2D();

        if (Game.IsControlJustPressed(0, GTA.Control.CursorAccept))
        {
            Function.Call(Hash._PUSH_SCALEFORM_MOVIE_FUNCTION, scaleform.Handle, "SET_INPUT_EVENT_SELECT");
            int handle = Function.Call<int>(Hash._POP_SCALEFORM_MOVIE_FUNCTION);
            /*
             * no need for the return value of Hash._0x2DE7EFA66B906036,
             * but have to do this so that the scaleform doesn't get broken
             * after multiple SET_INPUT_EVENT_SELECT commands !!
             * In the scripts it is used to get a value, but I haven't been able
             * to duplicate that, cuz Hash._0x768FF8961BA904D6 has never
             * returned true, so Hash._0x2DE7EFA66B906036 never even gets executed.
             */
            if (Function.Call<bool>(Hash._0x768FF8961BA904D6, handle)) Function.Call<int>(Hash._0x2DE7EFA66B906036, handle);
        }

        // user accepted/canceled with keyboard
        if (Game.IsControlJustPressed(0, GTA.Control.FrontendAccept))
        {
            Tick -= InputRequestTick;
            inputRequest = false;
            // do stuff on accept
            UI.ShowSubtitle("GTA.Control.FrontendAccept");
        }
        else if (Game.IsControlJustPressed(0, GTA.Control.FrontendCancel))
        {
            Tick -= InputRequestTick;
            inputRequest = false;
            // do stuff on cancel
            UI.ShowSubtitle("GTA.Control.FrontendCancel");
        }
        // user accepted/canceled by clicking on one of the Scaleform Buttons !!
        // (or the corresponding controls if you just try them all, cuz you won't know them)
        else if (Game.IsControlJustPressed(0, GTA.Control.PhoneUp))
        {
            Tick -= InputRequestTick;
            inputRequest = false;
            // do stuff on accept
            UI.ShowSubtitle("GTA.Control.PhoneUp");
        }
        else if (Game.IsControlJustPressed(0, GTA.Control.PhoneDown))
        {
            Tick -= InputRequestTick;
            inputRequest = false;
            // do stuff on cancel
            UI.ShowSubtitle("GTA.Control.PhoneDown");
        }
    }

    private void UpdateScaleform()
    {
        while (!scaleform.IsLoaded) Wait(5);
        scaleform.CallFunction("CLEAR_ALL");
        scaleform.CallFunction("TOGGLE_MOUSE_BUTTONS", false);
        SetInputDataSlot(0, "MO_YES", GTA.Control.FrontendAccept, GTA.Control.PhoneUp);
        SetInputDataSlot(1, "MO_NO", GTA.Control.FrontendCancel, GTA.Control.PhoneDown);
        scaleform.CallFunction("DRAW_INSTRUCTIONAL_BUTTONS", -1);
    }

    /*
     * You can even have the Scaleform return different control values
     * if you'd want that, using ScaleformButtonReturnValue !
     * but normaly you just want one control value for both PARAMETERs
     */
    private void SetInputDataSlot(int slot, string label, GTA.Control control, GTA.Control ScaleformButtonReturnValue)
    {
        Function.Call(Hash._PUSH_SCALEFORM_MOVIE_FUNCTION, scaleform.Handle, "SET_DATA_SLOT");
        Function.Call(Hash._PUSH_SCALEFORM_MOVIE_FUNCTION_PARAMETER_INT, slot);
        Function.Call(Hash._0xE83A3E3557A56640, Function.Call<string>(Hash._GET_CONTROL_ACTION_NAME, 2, (int)control, 1));
        Function.Call(Hash._BEGIN_TEXT_COMPONENT, label);
        Function.Call(Hash._END_TEXT_COMPONENT);
        if (Function.Call<bool>(Hash.IS_PC_VERSION))
        {
            Function.Call(Hash._PUSH_SCALEFORM_MOVIE_FUNCTION_PARAMETER_BOOL, true);
            Function.Call(Hash._PUSH_SCALEFORM_MOVIE_FUNCTION_PARAMETER_INT, (int)ScaleformButtonReturnValue);
        }
        Function.Call(Hash._POP_SCALEFORM_MOVIE_FUNCTION_VOID);
    }

    protected override void Dispose(bool disposenow)
    {
        if (disposenow)
        {
            scaleform.Unload();
        }
    }
}