public ViewLayoutRibbonAppTab(KryptonRibbon ribbon)
{
Debug.Assert(ribbon != null);
_ribbon = ribbon;
// Check the control is licenced
PerformLicenceChecking(ribbon);
_appTab = new ViewDrawRibbonAppTab(ribbon);
// Dock it against the appropriate edge
Add(_appTab, ViewDockStyle.Bottom);
Add(new ViewLayoutSeparator(1), ViewDockStyle.Left);
}