[cyber]

Poznakomlus, не так случайно?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;


namespace DesingeSlideTab
{

   public class SlideForm: Form
    {
       private bool _hover = false;

      public delegate void ChangeBox(bool value);

       public event ChangeBox ChangeMininizeBox;
       public event ChangeBox ChangeMaximizeBox;

        public bool IsTilteBar 
        {
            get { return _hover; }

           set 
           {
               _hover = value; 
           }
        }

        private int WS_CAPTION = (int)0x00C00000L;

        protected override CreateParams CreateParams
        {
            get
            {
                CreateParams cp = base.CreateParams;

                cp.Style &= ~WS_CAPTION;

                return cp;
            }
        }

        private const int WM_NCHITTEST = 0x84;
        private const int HTCAPTION = 0x2;
        private const int HTCLIENT = 0x1;


        protected override void WndProc(ref Message m)
        {
           base.WndProc(ref m);

           if (m.Msg == WM_NCHITTEST && _hover && (int)m.Result == HTCLIENT)
           {
               
               m.Result = (IntPtr)HTCAPTION;

           }

        }

        public new bool MaximizeBox
        {
            get { return base.MaximizeBox; }

            set {

                base.MaximizeBox = value;

                if (ChangeMaximizeBox != null)
                    ChangeMaximizeBox(value);
            }
        
        }

        public new  bool MinimizeBox
        {
            get { return base.MinimizeBox; }

            set
            {

                base.MinimizeBox = value;

                if (ChangeMininizeBox != null)
                    ChangeMininizeBox(value);

            }

        }

    }
}