>then no method to do timer , login user information and picturebox control company logo?
>
>And then use mdi , background will auto gray color. So i must change the background image to white image.
>Although i use company logo change the background image, it also big problem. My company logo is too small, can't to full screen and i
>want to white background .

Timer is not a problem - there's no visual presence. Try setting BackgroundImageLayout to Stretch.