// prevents the scrolling through of the items when the UltraCombo is closed.
UltraCombo combo = sender as UltraCombo;
if (combo != null &&
!this.ultraCombo1.IsDroppedDown)
((HandledMouseEventArgs)e).Handled = true;
// prevents the scrolling of the underlying drop-down grid
UltraCombo combo = sender as UltraCombo;
if (combo != null &&
this.ultraCombo1.IsDroppedDown)
((HandledMouseEventArgs)e).Handled = true;