So I am Trying to make a small mod for learning purposes that works like this : When you read a book you get an extra 150 magicka to your magicka pool.

This is small and simple for many probably but I am just starting to learn so I would like some help with this. Here's what I came up with. (P.s. I can guess that this script is completely wrong.)

ScriptName BookofMagika

Short Doonce

Begin OnEquip
If Doonce == 0
Cast AyrtonsMagickaFortify Player
Set Doonce to 1
EndIf
End

Any help on this would be greatly appreciated, Thanks!

does it run ?
what 's the spell script ?

check http://cs.elderscrolls.com/constwiki/index.php/Cast. It has some gotchas - not sure it works on a book. Why not put the spell in the doonce block - like :
if doOnce == 0
player.http://cs.elderscrolls.com/constwiki/index.php/ModActorValue magicka 150
...
modav is not the best way to do it - I leave it as an exercise
(hint : ability)

I'm not sure the OnEquip logic works for books. You may want to try with OnActivate. If you want the player to gain a permanent increase of magicka points the best way is to add an ability to the player with the addspell command, not cast a spell on the player. (the "cast" command tends to be pretty iffy most of the time anyways). You can also use ModAV, but that value can mess up stats if it's used incorrectly. Although I doubt your script would cause any real issues with stats since it has a DoOnce flag attached to it. Anyways, it's better to be safe than sorry.

ScriptName BookofMagikashort DoOnceBegin OnEquip	if ( DoOnce == 0 )		player.addspell BookofMagikaAbility		set DoOnce to 1	endifend

If for some reason that won't work, you could try using an OnActivate block instead, but I assume that will only work if the book is not placed in a container.

ScriptName BookofMagikashort DoOnceBegin OnActivate	if ( DoOnce == 0 )		player.addspell BookofMagikaAbility		set DoOnce to 1	endifend

Hope this helps...

It does - runs when book in inventory. Onactivate runs when book is in the open - check DLC spell tomes for examples.
Both are needed to have a book behave as usual.

Thanks for clearing that up

Welcome

Thanks everyone for the help! I got it working perfectly so that you read the book, gain the effect and it only happens once. Here's the script I used for those who want to see it.

ScriptName BookofMagika

Short Doonce

Begin OnActivate
If ( Doonce == 0 )
Player.addspell AyrtonsMagikaFortify
Activate
Set Doonce to 1
EndIf
Activate
End

AyrtonsMagikaFortify (I know I spelled Magicka wrong) is an Ability that give +150 Magicka Fortify. I did not think that player.addspell would work because I thought it would give me a fortify magicka spell. I now know that it wont and why. Thanks again for the Help everyone!

Welcome - you don't need double activation btw

ScriptName BookofMagikaShort DoonceBegin onactivateActivateIf ( Doonce == 0 )Player.addspell AyrtonsMagikaFortifySet Doonce to 1EndIfEnd

Does this work from the inventory ? that would prove me wrong

Thanks very much guys, and that script you offered Utumno it works like a charm