Limit angle for weapon

Im using this formula to calculate angle of players gun:

Code:

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ATan2(Y( "minigun" ) - YMouse, XMouse - X( "minigun" ) )

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And angle of minigun is set exacly what I wanted, but... I need to limit this angle between -90 degrees
(wich means weapon is facing straight down to the ground)

and 60 degrees (wich is slightly up to the sky).

//refrasing question.

Now how reset var CurrAngle, when this is not working
http://screenshu.com/static/uploads/.../g3/wpx6xn.jpg

Event #23 set angle
Event #24 resets to 0 angle...

You should remove the "OR" X) (and also always can go)
Angle difference must be both >-90 and <= 60

now you need a "OR" XD

Ok, nevermind. I found solution, crappy way, but now works.
But good advices would be appreciated