Before proceding, make sure you have this extension.

Advanced Direction object

Without this extension the end result cannot be achieved. It comes in MMF2's bonus pack 1. Download it here. http://www.clickteam.com/eng/downloadcenter.php?i=175

What you'll need...

3 active objects
1 ADO (Advanced Direction Object, for short.)

Alright, rename one active to Missile, one to Target and the last one to Missile launcher.

Also, to make the missile look better when rotating, place the action point of the missile in the middle.

In the event editor, add...

● Start of frame

The action...

-Destroy(Missile)

Destroying the missile at the beginning of the frame will prevent our game from getting buggy.

There's not much action going on; why don't we spruce it up with some firepower? To fire a missile from the launcher, add this condition...

● Upon pressing X

Lights, camera, action!

-Shoot (missile) at Speed 30 toward (X,Y) from (Target)

Of course, we don't want our missiles to just hang around the target, so...

● Collision between(missile)and(target)

-Destroy(missile)
-(This one is optional. ) Destroy(target)

Here's where it might get tricky for you noobs. (Yes, me too. lol)

● Always

And the action...

-Set angle (Missile) to LongDir( Advanced Direction Object, X(missile), Y(missile), X(target), Y(target))

-Look at (X,Y) from (target)

And there it is! A nice homing missile to ensure a win.

If the tutorial didn't help, here's an mfa. (Yeah, the rocket was taken from Flyte. )

http://files.filefront.com/Rocket+thingmfa/;12933304;/fileinfo.html

Thanks for reading!