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

Global $g_idTreeView

Example()

Func Example()
    Local $hItem, $hImage, $iImage
    Local $iStyle = BitOR($TVS_EDITLABELS, $TVS_HASBUTTONS, $TVS_HASLINES, $TVS_LINESATROOT, $TVS_DISABLEDRAGDROP, $TVS_SHOWSELALWAYS, $TVS_CHECKBOXES)

    GUICreate("TreeView Click Item", 400, 300)

    $g_idTreeView = GUICtrlCreateTreeView(2, 2, 396, 268, $iStyle, $WS_EX_CLIENTEDGE)
    GUISetState(@SW_SHOW)

    GUIRegisterMsg($WM_NOTIFY, "WM_NOTIFY")

    $hImage = _GUIImageList_Create(16, 16, 5, 3)
    _GUIImageList_AddIcon($hImage, "shell32.dll", 110)
    _GUIImageList_AddIcon($hImage, "shell32.dll", 131)
    _GUIImageList_AddIcon($hImage, "shell32.dll", 165)
    _GUIImageList_AddIcon($hImage, "shell32.dll", 168)
    _GUIImageList_AddIcon($hImage, "shell32.dll", 137)
    _GUIImageList_AddIcon($hImage, "shell32.dll", 146)
    _GUICtrlTreeView_SetNormalImageList($g_idTreeView, $hImage)

    _GUICtrlTreeView_BeginUpdate($g_idTreeView)
    For $x = 1 To Random(2, 10, 1)
        $iImage = Random(0, 5, 1)
        $hItem = _GUICtrlTreeView_Add($g_idTreeView, 0, StringFormat("[%02d] New Item", $x), $iImage, $iImage)
        For $y = 1 To Random(2, 10, 1)
            $iImage = Random(0, 5, 1)
            _GUICtrlTreeView_AddChild($g_idTreeView, $hItem, StringFormat("[%02d] New Child", $y), $iImage, $iImage)
        Next
    Next
    _GUICtrlTreeView_EndUpdate($g_idTreeView)

    _GUICtrlTreeView_ClickItem($g_idTreeView, $hItem, "left", False, 2)

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

Func WM_NOTIFY($hWnd, $iMsg, $wParam, $lParam)
    #forceref $hWnd, $iMsg, $wParam
    Local $hWndFrom, $iIDFrom, $iCode, $tNMHDR, $hWndTreeview
    $hWndTreeview = $g_idTreeView
    If Not IsHWnd($g_idTreeView) Then $hWndTreeview = GUICtrlGetHandle($g_idTreeView)

    $tNMHDR = DllStructCreate($tagNMHDR, $lParam)
    $hWndFrom = HWnd(DllStructGetData($tNMHDR, "hWndFrom"))
    $iIDFrom = DllStructGetData($tNMHDR, "IDFrom")
    $iCode = DllStructGetData($tNMHDR, "Code")
    Switch $hWndFrom
        Case $hWndTreeview
            Switch $iCode
                Case $NM_CLICK ; The user has clicked the left mouse button within the control
                    _DebugPrint("$NM_CLICK" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _
                            "-->IDFrom:" & @TAB & $iIDFrom & @CRLF & _
                            "-->Code:" & @TAB & $iCode)
                    ; Return 1 ; nonzero to not allow the default processing
                    Return 0 ; zero to allow the default processing
                Case $NM_DBLCLK ; The user has double-clicked the left mouse button within the control
                    _DebugPrint("$NM_DBLCLK" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _
                            "-->IDFrom:" & @TAB & $iIDFrom & @CRLF & _
                            "-->Code:" & @TAB & $iCode)
                    ; Return 1 ; nonzero to not allow the default processing
                    Return 0 ; zero to allow the default processing
                Case $NM_RCLICK ; The user has clicked the right mouse button within the control
                    _DebugPrint("$NM_RCLICK" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _
                            "-->IDFrom:" & @TAB & $iIDFrom & @CRLF & _
                            "-->Code:" & @TAB & $iCode)
                    ; Return 1 ; nonzero to not allow the default processing
                    Return 0 ; zero to allow the default processing
                Case $NM_RDBLCLK ; The user has double-clicked the right mouse button within the control
                    _DebugPrint("$NM_RDBLCLK" & @CRLF & "--> hWndFrom:" & @TAB & $hWndFrom & @CRLF & _
                            "-->IDFrom:" & @TAB & $iIDFrom & @CRLF & _
                            "-->Code:" & @TAB & $iCode)
                    ; Return 1 ; nonzero to not allow the default processing
                    Return 0 ; zero to allow the default processing
            EndSwitch
    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_NOTIFY

Func _DebugPrint($s_Text, $sLine = @ScriptLineNumber)
    ConsoleWrite( _
            "!===========================================================" & @CRLF & _
            "+======================================================" & @CRLF & _
            "-->Line(" & StringFormat("%04d", $sLine) & "):" & @TAB & $s_Text & @CRLF & _
            "+======================================================" & @CRLF)
EndFunc   ;==>_DebugPrint