如何创建TabPage的子类，我可以像UserControl一样编辑它？

I want to create a subclass of TabPage that contains some control, and I want to control the layout and properties of those controls through the designer. However, if I open my subclass in the designer, I can't position them like I could on a UserControl. I don't want to have to create a TabPage with an UserControl instance on it, I want to design the TabPage directly.I want to create a subclass of TabPage that con