no return value question?

[netegg]

How to use the UDF with no return value? Who can tell me?

[JustinReno]

What UDF?

[MHz]

What UDF?

This one for example.

$value = _test()
$size = StringLen($value)
MsgBox(0, 'Return', 'Value = ' & $value & @CRLF & 'Size = ' & $size)

Func _test()
EndFunc

I am not sure when it changed from "" to 0.

I consider it as a bug as 0 is something except as being used within a number condition.

Edit:

VBScript Function behavior returns "" as an indicator of expected default return behavior.

value = test()
size = Len(value)
MsgBox "Value = " & value & vbCRLF & "Size = " & size, 0, "Return"

Function test()
    'test = 0
End Function

Edited March 24, 2008 by MHz

[netegg]

What UDF?

just like _GUICtrlListView_ClickItem or _GUICtrlTreeView_ClickItem, and it's too diffcult to control the output value with the WM_NOTIFY, so I can get a value by msgbox, but can not to identify the value's accuracy

Edited March 24, 2008 by netegg

[martin]

just like _GUICtrlTreeView_ClickItem

To use the function you just call it with the parameters you need.

Maybe you could explain a bit more about your problem or what it is you don't understand.