VB实现图片的淡入淡出效果，Sleep为延时函数以毫秒为单位指定等待的时间，设置Form、Picture1和Picture2的标志单位为像素，淡入效果和淡出效果分开来实现，有各自的代码，淡入淡出在一些图片处理中应用广泛，在WEB前端设计中也有相当普遍的用途-VB realize the picture fade effect, Sleep function for the delay in milliseconds to wait for a specified time, set Form, Picture1 and Picture2 sign in pixels, fade-in and fade-out effects of separate effects to achieve, have their own code, Fade In some image processing in a wide range of applications, WEB front-end design is also quite common purpose