网上流传的TipTool气泡窗口 是以控件为基础的，作为控件的子窗口。 我做了改良，以点为基础， 根据某点，弹出窗口-TipTool circulated on the Internet is a bubble window-based control as child window control. I made improvements to the basis points, according to a certain point, the pop-up window