Events allow the CON programmer to change the processing on an event.

Events are defined in enhance.con

Event blocks are started with 'onevent' and ended by 'endevent'

So,

onevent EVENT_INIT
{
}
endevent  

Events are:

EVENT_INIT

Called when game is initialized, just after script is parsed. 
Only called once per game.

EVENT_ENTERLEVEL

Called when a level is being entered
'LEVEL' is level number
'VOLUME' is volume number

EVENT_RESETWEAPONS

Called when player's weapons are reset.  This happens when they enter a level, and each time they 'come to life'

EVENT_RESETINVENTORY

Called when player's inventory is reset.

EVENT_HOLSTER

The player has pressed the 'holster' key.

Set 'RETURN' to zero to allow default processing (the default is to allow processing).

You can also execute any code in the event handler (such as changing weapon flags, etc)

EVENT_LOOKLEFT

The player hit the 'look left' key.

Set 'RETURN' to zero to allow default processing

EVENT_LOOKRIGHT

The player hit the 'look right' key.

Set 'RETURN' to zero to allow default processing

EVENT_SOARUP

The player hit the 'JUMP' key while the jetpack is active.

Set 'RETURN' to zero to allow default processing

EVENT_SOARDOWN

The player hit the 'Crouch' key while the jetpack is active.

Set 'RETURN' to zero to allow default processing

EVENT_CROUCH

The player hit the 'crouch' key.

Set 'RETURN' to zero to allow default processing

EVENT_JUMP

The player hit the 'Jump' key.

Set 'RETURN' to zero to allow default processing

EVENT_RETURNTOCENTER

The player hit the 'Return to center' key.

Set 'RETURN' to zero to allow default processing

EVENT_LOOKUP

The player hit the 'look up' key.

Set 'RETURN' to zero to allow default processing

EVENT_LOOKDOWN

The player hit the 'look down' key.

Set 'RETURN' to zero to allow default processing

EVENT_AIMUP

The player hit the 'aim up' key.

Set 'RETURN' to zero to allow default processing

EVENT_AIMDOWN

The player hit the 'aim down' key.

Set 'RETURN' to zero to allow default processing

EVENT_FIRE

The player hit the 'Fire' key.

'WEAPON' is set to the weapon ID that is firing.
'WORKSLIKE' is set to the weapon's WorkLike setting.

So,

onevent WEAPON_FIRE
{
	ifvare WOKSLIKE PISTOL_WEAPON
	{
		ifvare PISTOLJAMMED 1
		{
			setvar RETURN 1 // don't fire if jammed
			setvar PISTOLJAMMED 0 // unjam it for next time
		}
	}
}
endevent  

Set 'RETURN' to zero to allow default processing

EVENT_CHANGEWEAPON

The player is changing weapons.

The new weapon is in 'WEAPON' and 'WORKSLIKE'

-1 means 'no weapon'

There is no return value.

EVENT_GETSHOTRANGE

Called when the player is shooting.

The current weapon is in 'WEAPON' and 'WORKSLIKE'

Return the shot random distribution in 'ANGRANGE' and 'ZRANGE'.

Default is '32', and '256'.  Numbers must be a power of two.

onevent EVENT_GETSHOTRANGE
{
	addlogvar WORKSLIKE // log the current value (debugging)
	ifvare WORKSLIKE PISTOL_WEAPON
	{
	  // dump the defaults...(debugging)
	   addlogvar ANGRANGE
	   addlogvar ZRANGE

	// set the values...
	   setvar ANGRANGE 2 // very accurate
	   setvar ZRANGE 16
	}
}
endevent
  

EVENT_GETAUTOAIMANGLE

Called when the auto aim angle is desired for the weapon.

Set 'AUTOAIMANGLE' to zero to disable auto-aim for the weapon.

Default value for AUTOAIMANGLE is 48.

onevent EVENT_GETAUTOAIMANGLE
{
	// default is 48
	ifvare WORKSLIKE PISTOL_WEAPON
	{
	   setvar AUTOAIMANGLE 64 // a 'wider' auto-aim angle.
	}
}
endevent  

EVENT_GETLOADTILE

Get the tile to display as background when starting a level.

Set value into 'RETURN'.  Default is LOADSCREEN (3281)

EVENT_CHEATGETSTEROIDS

Player has entered a cheat to get steroids. 
Set RETURN to amount of steroids to get.

On entry, RETURN is set to default.

EVENT_CHEATGETHEAT

Player has entered a cheat to get night vision. 
Set RETURN to amount of night vision to get.

On entry, RETURN is set to default.

EVENT_CHEATGETBOOT

Player has entered a cheat to get inventory item. 
Set RETURN to amount of item to get.

On entry, RETURN is set to default.

EVENT_CHEATGETSHIELD

Player has entered a cheat to get inventory item. 
Set RETURN to amount of item to get.

On entry, RETURN is set to default.

EVENT_CHEATGETSCUBA

Player has entered a cheat to get inventory item. 
Set RETURN to amount of item to get.

On entry, RETURN is set to default.

EVENT_CHEATGETHOLODUKE

Player has entered a cheat to get inventory item. 
Set RETURN to amount of item to get.

On entry, RETURN is set to default.

EVENT_CHEATGETJETPACK

Player has entered a cheat to get inventory item. 
Set RETURN to amount of item to get.

On entry, RETURN is set to default.

EVENT_CHEATGETFIRSTAID

Player has entered a cheat to get inventory item. 
Set RETURN to amount of item to get.

On entry, RETURN is set to default.

EVENT_QUICKKICK

Player has hit the button (key).

On entry, RETURN is set to 0

Set RETURN to non-zero to prevent use of key.

EVENT_INVENTORY

Player has hit the button (key).

On entry, RETURN is set to 0

Set RETURN to non-zero to prevent use of key.

EVENT_USENIGHTVISION

Player has hit the button (key).

On entry, RETURN is set to 0

Set RETURN to non-zero to prevent use of key.

EVENT_USESTEROIDS

Player has hit the button (key).

On entry, RETURN is set to 0

Set RETURN to non-zero to prevent use of key.

EVENT_INVENTORYLEFT

Player has hit the button (key).

On entry, RETURN is set to the next inventory item.

Set RETURN to zero to select no inventory item

EVENT_INVENTORYRIGHT

Player has hit the button (key).

On entry, RETURN is set to the next inventory item.

Set RETURN to zero to select no inventory item

EVENT_HOLODUKEON

Player has hit the button (key) and Holoduke is turning on.

On entry, RETURN is set to 0

Set RETURN to non-zero to prevent use of key.

EVENT_HOLODUKEOFF

Player has hit the button (key) and Holoduke is turning off

On entry, RETURN is set to 0

Set RETURN to non-zero to prevent use of key.

EVENT_USEMEDKIT

Player has hit the button (key).

On entry, RETURN is set to 0

Set RETURN to non-zero to prevent use of key.

EVENT_USEJETPACK

Player has hit the button (key).

On entry, RETURN is set to 0

Set RETURN to non-zero to prevent use of key.

EVENT_TURNAROUND

Player has hit the button (key).

On entry, RETURN is set to 0

Set RETURN to non-zero to prevent use of key.