Freelancer:
gold8000
C# Solution
Not exactly C++, but I recently found a way to do as you please. This is a random number generator that is set up with the joypad configuration using keys Z, X, C, V, W, A, S, D. You can modify it to do what you want though. The most important thing to note is that it is a REQUIREMENT to use Spy++ in this program as line 16 will be different with every gameboy active.
