Delphi实现可变背景的窗体，本程序可实现随机背景、可变背景图案、窗体渐变背景和自定义背景图片的方式，一共是四种背景渐变可选择，对与制作个性化的漂亮窗体有帮助。-Delphi implementation of variable background form, this procedure can achieve the random background, variable background pattern, form a gradient background and custom background image, a total of four kinds of background gradient can choose, to help beautiful form and personalized.