Introduction - If you have any usage issues, please Google them yourself
C# window design example, a similar QQ main form function of this window is a long vertical floating anywhere on the screen, you can hide it, when you use the mouse to drag its title bar to the edge of the screen, it will be hidden on the screen edge, a line, mouse again moved to the online form automatically appears, not the production of C# floating forms friends, this is a good reference example, the code is suitable for beginners to learn, floating form source file sharing for everyone to download Oh.