Frames per Second display

Unfortunately, DirectX doesn't have a built-in timer. You'll have to calculate fps yourself. There are a lot of discussions about just how to do that here on gamedev. Search for "frames per second" in the search box in the upper right-hand corner of this gamedev screen and take a look at the discussions.

I use Fraps ^_^

Try FRAPS.
You just run it with your game and dont need to change anything in your code.

The by far easiest way is to use the SetTimer() Windows API function with 1000ms, increment an integer after each buffer swap, and upon receiving a WM_TIMER, save the counter's value and reset it to zero.

I really do not recommend using WINAPI stil...

Is really easy to make your own timer, just get the actual tima minus the last time, that's your time differential between (dt) frames, as Buckeye says, there is
a lot of way to do it, you can add your dt every frame until you pass one second, then you can count how many frames your application can render on one second.

Is cheaper than use FRAPS (wich will slow down your app about 2-3 fps).