App 9 trouble.

Hi, I've finished App the easy way (i.e.: not making a key gen), but i want to learn how to finish it properly. I'm really stuck as to finding the algorithm as I don't know how to go about it… can anyone help?

Try putting a breakpoint on both of the GetWindowTextA functions, and look at the code after those two functions. The lazy way of keygenning it would be be to copy and paste all that assembly code in a keygen template and run it, which is what I did at first :D. But you could study how the code works and shorten it to only a few lines.