Try setting the UltraExplorerBarGroup.Settings.AppearancesSmall.HeaderHotTrackAppearance.Cursor property.

This might not be exactly what you're looking for, but this is what I did to find out what was clicked on, at least for the stuff that I was interested in anyway:

var group = explorerBar.GroupFromPoint(mouseClickLocation);

if (group != null)
{       
     // You now know that a group was clicked on. Keep going if you want to
     // know specifically where.

     var uiElement = group.UIElement.ElementFromPoint(mouseClickLocation);

     if (uiElement as EditorWithTextDisplayTextUIElement != null)
     {
          // User clicked on the header.
     }

     var expansionButton = uiElement as ExpansionButtonUIElement;

     if (expansionButton != null)
     {
         // User clicked on expand/collapse button
     }
}

You can always set a breakpoint once uiElement is acquired to find out exactly what ui element was clicked on. Hope this helps.

Re: Cursor over group header bar?
By solomonfried in WinExplorerBar

Don't have a solution and am looking for one.

I have a pop-up menu to allow a user to set Group Header appearance properties (icon size...).

I would like to know where the user clicked to get the menu so that I can set properties for the Overflow area, or the header area etc...

Thanks