Optional parameter not declared when func called via OnEventMode

[wraithdu]

This script will crash when the button is clicked with an error saying $var is not declared. In message mode, this crash does not happen.

Opt("GUIOnEventMode", 1)

$GUI = GUICreate("GUI")
$button = GUICtrlCreateButton("Test", 10, 10, 50, 20)
GUICtrlSetOnEvent(-1, "_Test")
GUISetOnEvent(-3, "_Exit")
GUISetState()

While 1
	Sleep(1000)
WEnd

Func _Test($var = "")
	If $var == "" Then Return 0
	Return $var
EndFunc

Func _Exit()
	Exit
EndFunc

[Valik]

It does not crash. It errors out with the expected error since what you are trying to do is not supported.

[wraithdu]

Fair enough. I can work around it then.

[Rob Saunders <therks@…>]

I know this is probably not kosher, but I've used code like this for the occasional shortcut.

Func _Test($var = "")
	If Not IsDeclared('var') Then Return 0
	Return $var
EndFunc

It should work in your situation.