Making a module: Void *?

Here is everything I have so far. It's not much but it's a start.
It's for OSX. I'm going to try to make it work on windows later when I have something up and running.

ModuleInfo "Version: 1.00"
ModuleInfo "License: HTTP://www.openal.org"
ModuleInfo "Modserver: PUB"


Import "-framework openal"

Extern
	Function alutInit( argc:Int, argv:String[] )
	Function alutExit()
	
	Function alutLoadWAVFile( path:Byte Ptr, format:Int Var, data:Byte Ptr, size:Int Var, freq:Int Var, loop:Int Var )
	Function alutUnloadWAV( format:Int, data:Byte Ptr, size:Int, freq:Int )
	

	Function alGetError:Int()

	Function alGenBuffers( num:Int, buffer:Int Var )
	Function alDeleteBuffers( num:Int, buffer:Int Var )
	
	Function alBufferData( buffer:Int, format:Int, data:Byte Ptr, size:Int, freq:Int )
	
	Function alGenSources( num:Int, source:Int Var )
	Function alDeleteSources( num:Int, source:Int Var )
	
	Function alSourcei( source:Int, al_type:Int, value:Int )
	Function alSourcef( source:Int, al_type:Int, value:Float )
	Function alSourcefv( source:Int, al_type:Int, value:Float[] )
		
	Function alSourcePlay( source:Int )
	Function alSourceStop( source:Int )
	Function alSourcePause( source:Int )
	
	
	Function alListenerfv( al_type:Int, value:Float[] )
	
	
End Extern

Const AL_NONE:Int = 0
Const AL_FALSE:Int = 0
Const AL_TRUE:Int = 1

Const AL_PITCH:Int = $1003
Const AL_POSITION:Int = $1004
Const AL_VELOCITY:Int = $1006
Const AL_LOOPING:Int = $1007
Const AL_BUFFER:Int = $1009
Const AL_GAIN:Int = $100A
Const AL_ORIENTATION:Int = $100F

Const AL_NO_ERROR:Int = AL_FALSE
Const AL_INVALID_NAME:Int = $A001
Const AL_INVALID_ENUM:Int = $A002  
Const AL_INVALID_VALUE:Int = $A003
Const AL_INVALID_OPERATION:Int = $A004
Const AL_OUT_OF_MEMORY:Int = $A005

test code:

Strict

AppTitle = "OpenAL test"
Graphics 640,480,0



alutinit(0,Null)
alGetError()

Global wav_data:Int
Global speaker:Int

Global speakerpos:Float[] = [ 0.0, 0.0, 0.0 ]
Global speakervel:Float[] = [ 0.0, 0.0, 0.0 ]
Global earpos:Float[] = [ 0.0, 0.0, 0.0 ]
Global earvel:Float[] = [ 0.0, 0.0, 0.0 ]
Global earorientation:Float[] = [ 0.0, 0.0, -1.0,  0.0, 1.0, 0.0 ]


If Not LoadData() Then
	EndGraphics()
	Notify "Error while loading data!"
	End
EndIf

SetSpeakerValues()

While Not KeyHit( KEY_ESCAPE )
	If KeyHit( KEY_P ) Then alSourcePlay( speaker )
	If KeyHit( KEY_S ) Then alSourceStop( speaker )
	If KeyHit( KEY_H ) Then alSourcePause( speaker )


	Cls
		DrawText "OpenAL test - ESC to quit", 50,50
		
		DrawText "P: Play", 100,100
		DrawText "S: Stop", 100,120
		DrawText "H: Pause", 100,140	
	
	Flip
Wend

KillData()
End



Function SetSpeakerValues()
    alListenerfv(AL_POSITION,    earPos)
    alListenerfv(AL_VELOCITY,    earVel)
    alListenerfv(AL_ORIENTATION, earOrientation)
EndFunction


Function LoadData:Int()
	Local format:Int
	Local size:Int
	Local data:Byte Ptr
	Local freq:Int
	Local loop:Int
	
	alGenBuffers(1, wav_data )
	If alGetError() <> AL_NO_ERROR Then Return False
	
	alutLoadWAVFile("test.wav".tocstring(), format, data, size, freq, loop )
	alBufferData( wav_data, format, data, size, freq )
	alutUnloadWAV( format, data, size, freq )
	
    ' Bind buffer with a source.
    alGenSources(1, speaker)

    If alGetError() <> AL_NO_ERROR Then Return False

    alSourcei (speaker, AL_BUFFER,   wav_data   )
    alSourcef (speaker, AL_PITCH,    1.0     )
    alSourcef (speaker, AL_GAIN,     1.0     )
    alSourcefv(speaker, AL_POSITION, SpeakerPos)
    alSourcefv(speaker, AL_VELOCITY, SpeakerVel)
    alSourcei (speaker, AL_LOOPING,  loop     )	

	Return True
EndFunction



Function KillData()
	alDeleteBuffers( 1, wav_data )
	alDeleteBuffers( 1, speaker )
	alutExit()
EndFunction

And finaly, the tutorial I'm following to learn OpenAL: http://www.devmaster.net/articles/openal-tutorials/lesson1.php

Edit:
Never used the $z thing before. Is this correct?
Function alutLoadWAVFile( path$z, '... and the rest
It compiles anyway and, as you said , didn't solve the crashing issue. :)

Edit2:
Also, OpenAL works just fine if I write a small test in C using the source from that tutorial.