如题，我想给程序添加一个广告，广告想用弹窗的形式来出现，但是不知道应该怎么来设置弹窗 注：弹窗最好时出现在右下角，像360开机助手那样的(For example, I want to add an ad to the program. The ads want to appear in the form of popups, but I don't know how to set up popups Note: when the b