可以加载PNG图片的PictureBox控件可以从资源文件中加载PNG图片（资源文件需要为自定义资源），也可以指定文件路径加载PNG图片。可以加载到PictureBox控件,也可以作为窗体背景显示-PNG images can be loaded from the PictureBox control to load the PNG image resource file (resource file needs to be custom resources), you can also specify the file path to load the PNG image. Can be loaded into a PictureBox control, the form can also be used as background display