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Treeview vs Listbox height

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I ran into something really strange: If I set the Treeview GUI height and the Listbox GUI height exactly the same, they appear differently.

I've tried testing with different values, and can't get them to be exactly the same.

Here's my test code. Try changing $LV_height and $LB_height to see what happens. Bumping $LB_height from 285 to 291 doesn't change the height of the listbox. It's still too short relative to the Treeview. Changing it to 292 makes it too tall. I'm baffled. Anyone know what the problem is?

#include "WindowsConstants.au3"
#include "ListBoxConstants.au3"
#include "TreeViewConstants.au3"

Dim $GUI_Main, $Functions_TV, $FunctionCode_LB_style, $FunctionCode_LB, $Close_btn
Dim $LV_height = 285
Dim $LB_height = 285;291 is too short, 292 is too tall. WTF?


GUICtrlCreateLabel("Treeview", 20, 30, 70, 20) 

GUICtrlCreateLabel("Listbox", 330, 30, 60, 20) 
$FunctionCode_LB = GUICtrlCreateList("", 330, 60, 300, $LB_height, $FunctionCode_LB_style)

$Close_btn = GuiCtrlCreateButton("Close", 300, 400, 60 , 30)

GUISetState(@SW_SHOW, $GUI_Main)

While 1
    $Msg = GUIGetMsg()
    Switch $Msg
        Case $Close_btn


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I believe that the height of the listbox is determined by the height of the lines in it. Which means it's a multiple of the row height, that's why you see such a big jump between 291 and 292. If you set the TreeView to 292 and the ListBox to 292, you'll see that they're the same height.

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