On my form I have a control array of 239 picture boxes NOT being moved. Then I create 5 picture boxes of a new control array and move them with a timer with the interval set to 10. It moves fine, but when I load another 5 picture boxes totaling 10 the game starts to lag by the images starting to move slower then set to. The more I load and more the slower it keeps getting.

I am increasing the .top of all of the picture boxes by 25 every time the timer ticks with a 10 interval.

How can I prevent this 'lag'?