#include <GUIConstantsEx.au3>
#include <GuiTreeView.au3>
#include <MsgBoxConstants.au3>
#include <WindowsConstants.au3>

Example()

Func Example()

        GUICreate("TreeView Get Sibling Count (v" & @AutoItVersion & ")", 400, 300)

        Local $iStyle = BitOR($TVS_EDITLABELS, $TVS_HASBUTTONS, $TVS_HASLINES, $TVS_LINESATROOT, $TVS_DISABLEDRAGDROP, $TVS_SHOWSELALWAYS, $TVS_CHECKBOXES)
        Local $idTreeView = GUICtrlCreateTreeView(2, 2, 396, 268, $iStyle, $WS_EX_CLIENTEDGE)
        GUISetState(@SW_SHOW)

        ; Set ANSI format
;~      _GUICtrlTreeView_SetUnicodeFormat($idTreeView, False)

        _GUICtrlTreeView_BeginUpdate($idTreeView)
        Local $aidItem[100], $aidChildItem[100], $iRand, $iChildRand, $iYItem
        $iRand = 6
        For $x = 0 To $iRand
                $aidItem[$x] = GUICtrlCreateTreeViewItem(StringFormat("[%02d] New Item", $x), $idTreeView)
                $iChildRand = 3;Random(0, 3, 1)
                For $y = 0 To $iChildRand
                        $aidChildItem[$iYItem] = GUICtrlCreateTreeViewItem(StringFormat("[%02d] New Item", $y), $aidItem[$x])
                        $iYItem += 1
                Next
        Next
        _GUICtrlTreeView_EndUpdate($idTreeView)

        $iRand = 5;Random(0, 9)
        MsgBox($MB_SYSTEMMODAL, "Information", StringFormat("Sibling Count for item index %d: %d", $iRand, _GUICtrlTreeView_GetSiblingCount($idTreeView, $aidItem[$iRand])))

        $iRand = 7; Random(0, 12)
        MsgBox($MB_SYSTEMMODAL, "Information", StringFormat("Sibling Count for Child item index %d: %d", $iRand, _GUICtrlTreeView_GetSiblingCount($idTreeView, $aidChildItem[$iRand])))
        _GUICtrlTreeView_Expand($idTreeView, _GUICtrlTreeView_GetParentHandle($idTreeView, $aidChildItem[$iRand]))
        _GUICtrlTreeView_SelectItem($idTreeView, $aidChildItem[$iRand])

        ; Loop until the user exits.
        Do
        Until GUIGetMsg() = $GUI_EVENT_CLOSE
        GUIDelete()
EndFunc   ;==>Example