Its usually either a manual or automated pitched up synth or upriser.
Find a sample or a synth patch you want to use and edit the length to either 8 bars or 16 bars depending how long you want the upriser to be. Then assign it to the pitch and automate it to rise so the pitch increases.
Alternatively, you can create a synth patch and record it while manually turning the pitch knob on your midi keyboard which is assigned to the plug in you are using.
I use Logic so i can't help you on exactly how to do it in Fruity Loops etc but its a standard process to do in any sequencer mate,