Calculator Error (Overflow) (Please Reply)

[zach1188]

If you've seen my other posts, then you know I have been making a calculator for my first program. I have been working on it for about 4 days now, trying to fix every error I come across. I have one more. If somone tries to do a problem, like 9999^9999 then the number will be to high, and they will get an overflow error. I need to know how I can set it up so if the answer is too high, then it makes the answer be somthing like '"Error! Number too high", and display that in the answer box on the calculator. Ive tried to set it so if:

Number1^Number2 > 999999999999999 then Answer = "Error"
Screen = Answer

Yet, I still get the overflow error.

P.S. I also have that problem with regular multiplication.