C#制作一个浮动的工具栏，那个漂亮的工具栏实际上是调用一张BMP位图作为背景，看上去还行吧？原以为使用了三方控件，在VS2005环境可直接编译。-C# make a floating toolbar, a toolbar that is actually a beautiful call a BMP bitmap as the background, looks okay, right? Originally thought that by using three controls, in th