Yes, you will need to put some phent_addcentralforce() calls (or something similar) somewhere in your while loop to enable your entity to move.

But how is your entity going to keep it's balance? How tall is it compared to it's width or length? If it's taller than it is wide and/or long, then you'll need to find some way to keep your entity standing. Maybe you could apply your forces to the bottom of your entity via phent_addvellocal(), thereby minimizing the problem of keeping your entity standing.

Of course, you could just ignore what I said above if it doesn't apply to your case.

Code:
void main()
{
    cout << "I am MrCode,";
    cout << "hear me roar!";
    system("PAUSE");
}