You don't need a flap controller. Just the proper ON-OFF-MOM switch and a couple of limit microswitches on the flap actuator or motor assembly. Hold the flap switch down to move the flaps down; flip it to the UP position and the flaps go all the way up. If you don't want them all the way up, move the switch back to the center position to stop them.
It may not be quite as fancy as a microprocessor based flap controller, but it's a lot cheaper and easier to fix in the field if something breaks. But if you're wanting to use a switch that is momentary in both directions and just needs a "blip" to raise the flaps, then yeah, the flap controller will do that.