How do you make an errr box. I have made a random lottery class , and I want to add 2 error boxes in it. I want this to occur via the OK button. Basically, the user inserts 6 random numbers between 1 and 49 into textboxes. When press ok, computer should generate its own random numbers. But if the user adds less then 6 numbers into text boxes, when pressed ok, and error box should appear, saying "Please enter 6 numbers" If the user inserts numbers higher than 49, the a error box should appear saying,"Enter numbers from 1 to 49" So far my code is like this:- Is anything wrong with this? It does design the outline of the Lottery game?