VC实现一个可移动位置的工具栏，像Office的一些工具栏一样，可以从主窗口拖出来，放在其它的工具栏旁边，也可将工具栏放回原处，实现起来并不复杂-VC to achieve the position of a movable toolbar, like the Office toolbar, you can drag from the main window, on the other next to the toolbar, the toolbar back in place, it is n