主要实现了在WINDOWS FORM设计器的开发过程中的窗体停靠，也就是DOCK方式，类似于VS的工具箱或者属性箱的停靠，内容短小精悍，供大家学习参考！-Main achieved WINDOWS FORM designer in the development process in the form of docking, which is DOCK mode, similar to the VS toolbox or properties box dock, the content shor