mySyntaxEditor1.SyntaxEditorElement.HorizontalScrollBar.Padding = new Padding(0, 0, 0, 2);

            this.radSyntaxEditor1.SyntaxEditorElement.IntelliPrompts.OverloadListWindow.VisibleChanged+=OverloadListWindow_VisibleChanged;

        private void OverloadListWindow_VisibleChanged(object sender, EventArgs e)
        {
           ShapedForm f = sender as ShapedForm;
            Screen myScreen = Screen.FromControl(this);
            Rectangle area = myScreen.WorkingArea;
            if (f.Left + f.Width > area.Width)
            {
                f.Left = area.Width - f.Width -5;
            }
        } 

            this.radSyntaxEditor1.SyntaxEditorElement.InputHandler = new MyInputBehavior(this.radSyntaxEditor1.SyntaxEditorElement);

        public class MyInputBehavior : SyntaxEditorInputBehavior
        {
            public MyInputBehavior(RadSyntaxEditorElement editor) : base(editor)
            {
                
            }

            protected override void PerformOpenFileDialog(KeyEventArgs e)
            {
                this.SyntaxEditor.SearchPanel.ReplaceAllButton.Enabled = false;
                this.SyntaxEditor.SearchPanel.ReplaceButton.Enabled = false;
                this.SyntaxEditor.SearchPanel.ReplaceTextBox.Enabled = false;
                base.PerformOpenFileDialog(e);
            }
        }