C#

private void addCloseButton(object sender, DrawItemEventArgs e)
{
    //This code will render a "x" mark at the end of the Tab caption.
    e.Graphics.DrawString("x", e.Font, Brushes.Black, e.Bounds.Right - 15 , e.Bounds.Top +4 );
    e.Graphics.DrawString(this.tabControl1.TabPages[e.Index].Text, e.Font, Brushes.Black, e.Bounds.Left+4, e.Bounds.Top+4);
    e.DrawFocusRectangle();

}

private void actionClose(object sender, MouseEventArgs e)
{
    //Looping through the controls.
    for (int i = 0; i < this.tabControl1.TabPages.Count; i++)
    {
        Rectangle r = tabControl1.GetTabRect(i);
        //Getting the position of the "x" mark.
        Rectangle closeButton = new Rectangle(r.Right - 15, r.Top + 4, 12, 10);
        if (closeButton.Contains(e.Location))
        {
            if (MessageBox.Show("?האם אתה רוצה לסגור טאב זה", "אישור", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                this.tabControl1.TabPages.RemoveAt(i);
                break;
            }
        }
    }

}

import units.types.Base;
import units.extensions.Damage;
import units.extensions.Transport;
import Containers, Input;
import World, Application, Math, Global, Sound;
import Localizer;
import Network;

class AmmoSupplyDescriptor
{
    init( node, c_desc ) {}

    destroy() {}

    create_extension( ext, unit )
    {
        return AmmoSupply().init( ext, unit, void );
    }
}

class AmmoSupply
{
    object _base;
    object _ext;
    object _unit;
    object _uvd;
    object _supply_event;
    object _set_to_supply;
    object _ignore_weapon;

super()
{
    return _base;
}

init( ext, unit )
{
    _base := Base.Base().init( unit );
    _unit := unit;
    _ext := ext;
    _supply_event := "";
    _set_to_supply := false;
    _ignore_weapon := "";
    _uvd := _unit.vehicle_data;
    return this;
}

update( unit, ext, time, rel_time ) {}

set_to_supply( switch, event_name, ignore_weapon )
{
    Application.debug("AmmoTruck::set_to_supply()");
    _set_to_supply := switch;

    if( switch )
    { // activate supply, deactivate all other
        _unit.base_data.usable := true;
        _unit.usable_data.hover_check_function := true;
        _supply_event := event_name;
        _ignore_weapon := ignore_weapon;
    } else { // deactivate supply, activate all other
        _unit.base_data.usable := false;
        _unit.usable_data.hover_check_function := false;
        _supply_event := "";
        _ignore_weapon := "";
    }
}

use( unit )
{
    Application.debug( "Mule::use(), _supply_event="+ _supply_event+ " _ignore_weapon="+_ignore_weapon );
    Network.server().from_client_ask_for_inventory_unit( true ); // this will open the inventory if we succeed

    if( _supply_event )
    { // This is old Single player stuff, probably it is not needed, or useful anymore
        Network.server().from_client_activate_event( _supply_event );
    }
}

check_usable_message( unit )
{
    Application.debug( "Mule::check_usable_message()");
    return Localizer.lookup( "message_to_resupply"  ).replace( "<*>", Global.input_manager._bindings.get_button_translated_name );
}

empty_update() {}

damage_explosion( damage, position) {}

explode() {}

airstrike()
{
    // Airstrike now die!
    explode();
}

destroy()
{
    object uvd := _unit.vehicle_data;
    _base.destroy();
    _base := void;
    _unit := void;
}

save( data )
{
    Application.debug( "Mule::save()" );
    object uvd := _unit.vehicle_data;
    data.save( "set_to_supply", _set_to_supply );
    data.save( "supply_event", _supply_event );
    data.save( "usable", _unit.base_data.usable );
    data.save( "hover_check_function", _unit.usable_data.hover_check_function );
}

load( data )
{
    Application.debug( "Mule::load()" );
    set_to_supply( data.load( "set_to_supply" ), data.load( "supply_event" ), data.load( "ignore_weapon" ) );

    if( _unit )
    {
        _unit.base_data.usable := data.load( "usable" );
        _unit.usable_data.hover_check_function := data.load( "hover_check_function" );
    } else {
        Application.error("The AmmoSupply did not load its usable info right");
        }
    }
}