Hello,

Thank you for the clarifications. The scrolling behaviour, you are talking about, is the default one. I am not sure how were you able to achieve something else. Is there any chance that you are running some custom code or handling a scroll event?

Could you please try to attach, if possible, a small sample project, reproducing the above mentioned issue, I will be happy to take a look at it?

Hello,

I am checking about the progress of this issue. Please let me know If you need any further assistance on this.     

I resolve my problem, 

public class PanelUC : UltraPanel

{
    #region Constructor

    public PannelUC()
    {
         this.Dock = System.Windows.Forms.DockStyle.Fill;
         this.AutoScroll = true;
         this.Scroll += new System.Windows.Forms.ScrollEventHandler(PanneauUC_Scroll);
     }

     #endregion

     #region Événements

     private void PannelUC_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
     {
           if (e.ScrollOrientation == ScrollOrientation.VerticalScroll)
                this.VerticalScrollProperties.Value = e.NewValue;
           else if (e.ScrollOrientation == ScrollOrientation.HorizontalScroll)
                this.HorizontalScrollProperties.Value = e.NewValue;
     } 

     #endregion
}

Now my panel scroll when i move de scroll cursor. Not just when i release mouse button.