List boxes and LB_SETITEMHEIGHT

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Leadwerks

I want to set the item height of a listbox. Before I did that, I figured I would try getting the item height, to make sure I was doing it right. This code should work, but returns 0. The only thing I can think of is either I am using the wrong hwnd, and I need a different one from the gadget, or maybe BlitzPlus listboxes are actually windows listview controls:

Const LB_SETITEMHEIGHT			=	416
Const LB_GETITEMHEIGHT			=	417

win=CreateWindow("",200,200,400,300)
list=CreateListBox(0,0,100,100,win)
AddGadgetItem list,"test"

hwnd=QueryObject(list,1)
Notify SendMessage(hwnd,LB_GETITEMHEIGHT,0,0)