protected virtual GcMdiTabControl.MdiTabCommandIconList.CloseCommandIcon CreateCloseCommandIcon()
Protected Overridable Function CreateCloseCommandIcon() As GcMdiTabControl.MdiTabCommandIconList.CloseCommandIcon
戻り値の型
GcMdiTabControl.MdiTabCommandIconList.CloseCommandIconオブジェクトは［閉じる］アイコンを示します。