How to add a context menu by pressing a RadButton?

[Serg]

How to add a context menu by pressing a RadButton?

ContextMenuStrip mainMenu = new ContextMenuStrip();
RadButtonElement btn = new RadButtonElement();

[Dess | Tech Support Engineer, Principal]

Hello, Serg,

Please have a look at the following help article which demonstrates how to create and show a RadContextMenu for a certain control: https://docs.telerik.com/devtools/winforms/controls/menus/contextmenu/add-context-menu-in-code 

I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik

[Serg]

Thank you! Another question: can you customize the menu so that it extends to the left of the location point?

ps By default, it exits to the right of the point

[Dess | Tech Support Engineer, Principal]

Hello, Serg,   

The RadContextMenu.Show method accepts a parameter specifying the exact location where to show the menu. If you want to show the menu at the left side of the cursor, you just need to adjust the location:  

        RadContextMenu radContextmenu = new RadContextMenu();

        public RadForm1()
        {
            InitializeComponent();

            RadMenuItem menuItem1 = new RadMenuItem();
            menuItem1.Text = "Show";
            radContextmenu.Items.Add(menuItem1);
            RadMenuItem menuItem2 = new RadMenuItem();
            menuItem2.Text = "Hide";
            radContextmenu.Items.Add(menuItem2);
        }

        private void radButton1_Click(object sender, EventArgs e)
        {
            var args = e as MouseEventArgs; 

            radContextmenu.Show(this.radButton1, new Point(args.Location.X - radContextmenu.DropDown.Width, args.Location.Y));
        }

        private void RadForm1_Load(object sender, EventArgs e)
        {
            radContextmenu.DropDown.LoadElementTree();
        }

I believe that it would fit your needs.

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik