A simple encryption/decryption programm

Don't expect too much from my code :(!! i'm a beginner, but I think it's a good code for a 13 years old :P!! In the .zip there are 2 directories: one contains the decryption program,the other contains the encryption program. How it works: ******Encryption******* 1)Open the encryption program and enter the text you want to encrypt into the big textbox!! 2)Enter the enrcyption key into the small textbox,only numbers(Later used for decryption,don't forget itn ;) ) 3)Press The program creates a file at: \encrypted.txt ******Decryption***** 1)Enter decrytion key 2)Press command button he program creates a file at: \decrypted.txt PLS COMMENT and sorry for grammar i'm hungarian