_GUICtrlTreeView_FindItem doesnt find item (Newbie)

[MrWhite]

Hi all,

I'm having problems automating the device manager. The problem to solve is, that my PC forgets all about it's HDMI audio output, when I switch to a different audio device. In this case the device has to be re-enabled.

So here is what I've got at the moment (mostly copied from other forum postings):

#RequireAdmin
#include-once
#Include <GuiTreeView.au3>

; Open Device Manager
Run(@ComSpec & " /c " & 'devmgmt.msc', "", @SW_HIDE)
WinWaitActive("Geräte-Manager")

$hTree = ControlGetHandle("Geräte-Manager", "", "[Class:SysTreeView32;Instance:1]")
$hItem = _GUICtrlTreeView_FindItem($hTree, "A", True)

MsgBox(1, "x", "tree=" & $hTree & " item=" & $hItem)

My problem is, that the finditem function does not find an item (i.e. $hItem is 0), although there is most definately an item containing "A". (I'm really looking for NVIDIA whatnot in the third level down from the root under audio devices, but I tried to ensure that the function is returning anything at all, which does not seem to be the case.)

I'm on Vista x64 using AutoIt v3.2.12.1 (according to the help file).

Thanks for any hints.

Best regards

Mr White

[Zedna]

Check value of $hTree

$hTree = ControlGetHandle("Geräte-Manager", "", "[Class:SysTreeView32;Instance:1]")

If @error then ...

Also try text "NVIDIA" instead of "A"

[MrWhite]

Hi Zedna!

Thanks for the hints.

Check value of $hTree

$hTree = ControlGetHandle("Geräte-Manager", "", "[Class:SysTreeView32;Instance:1]")

If @error then ...

$hTree contains a handle to the tree.

Also try text "NVIDIA" instead of "A"

I had tried NVIDIA first, but that didn't return anything. There are definately items containing the upercase letter A, so the function should return a handle to some item.

Anyway I got a bit further by trying out some other variants, but have run into more problems.

I'll do another post with my current code.

Best Regards