In Treeview with icons, have temporary item with no icon

[c.haslam]

I have a Treeview with icons. Sample code:

$cItem = GUICtrlCreateTreeViewItem('Network',$cTV)
            GUICtrlSetImage($cItem,'shell32.dll',-(17+1),4)
            ; add blank item so know no children; also cause [+] to show
            $cTempItem = GUICtrlCreateTreeViewItem("", $cItem)

Following Melba23, the "" item only exists initially -- until user expands Network.

When the user clicks on the [+], in the message loop, the "" item is replaced by items whose text is the names of PCs on the network.

The problem is that, because other items have icons, the "" shows with an icon. It should not.

How do I get rid of the icon beside the "" item?

I have tried putting GuiCtrlSetState($cTempItem,$GUI_HIDE)

The same thing happens when a PC item is expanded to show shareable drives.  In this case, the expansion must happen in the message loop, for speed to be acceptable.

My script, an extension of Melba23's ChoosFileFinder, simulates FileFindFolder, and can be positioned on the screen (and in the future, may be able to be embedded in a dialog).

Edited August 29, 2018 by c.haslam