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Opened on Apr 25, 2026 at 4:12:22 PM

Last modified on May 12, 2026 at 4:03:12 PM

#4090 new Bug

x64 - GUI freezes with Header subclassing in ListView

Reported by: Nine Owned by:
Milestone: Component: AutoIt
Version: 3.3.18.0 Severity: None
Keywords: Cc:

Description (last modified by mLipok)

It is a very basic example. It may takes a little while to get it frozen. You need to modify the size of the columns repeatedly. It happens both x86 and x64 but more often with the later.

#AutoIt3Wrapper_UseX64=y

; From Nine
#include <GuiConstants.au3>
#include <WinAPI.au3>
#include <GuiListView.au3>

Example()

Func Example()
  Local $hGUI = GUICreate("Header issue", 500, 300)

  Local $idListView = GUICtrlCreateListView("Items List|SubItems1|SubItems2", 10, 10, 480, 280, -1, $LVS_EX_DOUBLEBUFFER)
  Local $hListView = GUICtrlGetHandle($idListView)
  Local $hHeader = GUICtrlSendMsg($idListView, $LVM_GETHEADER, 0, 0)

  Local $hSubClass = DllCallbackRegister(WM_NOTIFY, "lresult", "hwnd;uint;wparam;lparam;uint_ptr;dword_ptr")
  _WinAPI_SetWindowSubclass($hHeader, DllCallbackGetPtr($hSubClass), 1000)

  For $i = 1 To 5
    GUICtrlCreateListViewItem("item" & $i & "|item" & $i & "|item" & $i , $idListview)
  Next

  GUISetState()

  Do
  Until GUIGetMsg() = $GUI_EVENT_CLOSE

  _WinAPI_RemoveWindowSubclass($hHeader, DllCallbackGetPtr($hSubClass), 1000)
  DllCallbackFree($hSubClass)
EndFunc   ;==>Example

Func WM_NOTIFY($hWnd, $iMsg, $wParam, $lParam, $iID, $pData)
  Return _WinAPI_DefSubclassProc($hWnd, $iMsg, $wParam, $lParam)
EndFunc   ;==>WM_NOTIFY

Attachments (0)

Change History (6)

comment:1 by mLipok, on May 10, 2026 at 1:30:23 AM

Description: modified (diff)
Summary: GUI freezes with Header subclassing in ListView → x64 - GUI freezes with Header subclassing in ListView

comment:2 by Jpm, on May 11, 2026 at 5:35:06 PM

I try the script without any success to reproduce
help!!!

comment:3 by mLipok, on May 11, 2026 at 8:39:43 PM

100% Example.

;~ https://www.autoitscript.com/trac/autoit/ticket/4090

#AutoIt3Wrapper_UseX64=y

; From Nine
#include <GuiConstants.au3>
#include <WinAPI.au3>
#include <GuiListView.au3>

Example()

Func Example()
        Local $hGUI = GUICreate("Header issue", 500, 300)
        #forceref $hGUI

        Local $idListView = GUICtrlCreateListView("Items List|SubItems1|SubItems2", 10, 10, 480, 280, -1, $LVS_EX_DOUBLEBUFFER)
        Local $hListView = GUICtrlGetHandle($idListView)
        #forceref $hListView
        Local $hHeader = GUICtrlSendMsg($idListView, $LVM_GETHEADER, 0, 0)

        Local $hSubClass = DllCallbackRegister(WM_NOTIFY, "lresult", "hwnd;uint;wparam;lparam;uint_ptr;dword_ptr")
        _WinAPI_SetWindowSubclass($hHeader, DllCallbackGetPtr($hSubClass), 1000)

        For $i = 1 To 5
                GUICtrlCreateListViewItem("item" & $i & "|item" & $i & "|item" & $i, $idListView)
        Next

        GUISetState()

        Do
                _GUICtrlListView_SetColumnWidth($hListView, 0, Random(10,200,1))
        Until GUIGetMsg() = $GUI_EVENT_CLOSE

        _WinAPI_RemoveWindowSubclass($hHeader, DllCallbackGetPtr($hSubClass), 1000)
        DllCallbackFree($hSubClass)
EndFunc   ;==>Example

Func WM_NOTIFY($hWnd, $iMsg, $wParam, $lParam, $iID, $pData)
        #forceref $iID, $pData
        Return _WinAPI_DefSubclassProc($hWnd, $iMsg, $wParam, $lParam)
EndFunc   ;==>WM_NOTIFY

comment:4 by mLipok, on May 11, 2026 at 8:43:54 PM

To fix it a little you can add Sleep(50)

        Do
                _GUICtrlListView_SetColumnWidth($hListView, 0, Random(10,200,1))
                Sleep(50)
        Until GUIGetMsg() = $GUI_EVENT_CLOSE

But still drag the window over tittle bar and ListView will hung.

comment:6 by Jpm, on May 12, 2026 at 4:03:12 PM

Trying I understand the pb I use the_WMDEBUG.au3 extras helpfile
and I get the display of the subclass notification
I am impress that for one change so many notifications
So I am sure I cannot find when a notifification will be desynchronised
I propose to close it as "will not be fixed"

with the following script

#AutoIt3Wrapper_UseX64=y
; From Nine
#include <GuiConstants.au3>
#include <WinAPI.au3>
#include <GuiListView.au3>

#include "C:\Program Files (x86)\AutoIt3\Examples\Helpfile\Extras\WMDebug.au3"

Example()

Func Example()
	Local $hGUI = GUICreate("Header issue", 500, 300)
	#forceref $hGUI

	Local $idListView = GUICtrlCreateListView("Items List|SubItems1|SubItems2", 10, 10, 480, 280, -1, $LVS_EX_DOUBLEBUFFER)
	Local $hListView = GUICtrlGetHandle($idListView)
	#forceref $hListView
	Local $hHeader = Ptr(GUICtrlSendMsg($idListView, $LVM_GETHEADER, 0, 0))

;~ 	Local $hSubClass = DllCallbackRegister(WM_NOTIFY, "lresult", "hwnd;uint;wparam;lparam;uint_ptr;dword_ptr")
;~ 	_WinAPI_SetWindowSubclass($hHeader, DllCallbackGetPtr($hSubClass), 1000)

	For $i = 1 To 1
		GUICtrlCreateListViewItem("item" & $i & "|item" & $i & "|item" & $i, $idListView)
	Next

	GUISetState()

	Local $hSubClass = DllCallbackRegister(WM_NOTIFY, "lresult", "hwnd;uint;wparam;lparam;uint_ptr;dword_ptr")
	_WinAPI_SetWindowSubclass($hHeader, DllCallbackGetPtr($hSubClass), 1000)

;~ 	Do;
	For $i = 0 To 1
		_GUICtrlListView_SetColumnWidth($hListView, 0, Random(10, 200, 1))
	Next

;~ 	Until GUIGetMsg() = $GUI_EVENT_CLOSE

	ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $hHeader = ' & $hHeader & @CRLF & '>Error code: ' & @error & '    Extended code: ' & @extended & ' (0x' & Hex(@extended) & ')' & @CRLF) ;### Debug Console
	_WinAPI_RemoveWindowSubclass($hHeader, DllCallbackGetPtr($hSubClass), 1000)
	DllCallbackFree($hSubClass)
EndFunc   ;==>Example

Func WM_NOTIFY($hWnd, $iMsg, $wParam, $lParam, $iID, $pData)
	#forceref $iID, $pData
	_WM_Debug($hWnd, $iMsg, $wParam, $lParam)

	Return _WinAPI_DefSubclassProc($hWnd, $iMsg, $wParam, $lParam)
EndFunc   ;==>WM_NOTIFY

notifications log

WP = 0x0000000000000000 | LP = 0x0000000010DDD4E0 | 0x120B
WP = 0x0000000000000000 | LP = 0x0000000010DDD490 | 0x120C
WP = 0x0000000000000000 | LP = 0x0000000010DD9C80 | 0x120B
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x0000000000000000 | LP = 0x0000000000000000 | WM_PAINT
WP = 0x0000000000000000 | LP = 0x0000000010DD9BF0 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000010DD9978 | 0x1205
WP = 0x0000000000000000 | LP = 0x0000000010DD98D0 | WM_WINDOWPOSCHANGING
WP = 0x0000000000000002 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000002 | LP = 0x0000000010DD96F0 | 0x120B
WP = 0x0000000000000002 | LP = 0x0000000010DD96E0 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000000000000 | WM_PAINT
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x0000000000000000 | LP = 0x0000000010DD8530 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000000 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000000 | LP = 0x0000000010DD8400 | 0x1207
WP = 0x0000000000000001 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000001 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000001 | LP = 0x0000000010DD8650 | 0x1207
WP = 0x0000000000000002 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000002 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000002 | LP = 0x0000000010DD8650 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000010DD8530 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000000 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000000 | LP = 0x0000000010DD8400 | 0x1207
WP = 0x0000000000000001 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000001 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000001 | LP = 0x0000000010DD8650 | 0x1207
WP = 0x0000000000000002 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000002 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000002 | LP = 0x0000000010DD8650 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000010DDD4E0 | 0x120B
WP = 0x0000000000000000 | LP = 0x0000000010DDD490 | 0x120C
WP = 0x0000000000000000 | LP = 0x0000000010DD9C80 | 0x120B
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x0000000000000000 | LP = 0x0000000000000000 | WM_PAINT
WP = 0x0000000000000000 | LP = 0x0000000010DD9BF0 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000010DD9978 | 0x1205
WP = 0x0000000000000000 | LP = 0x0000000010DD98D0 | WM_WINDOWPOSCHANGING
WP = 0x0000000000000002 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000002 | LP = 0x0000000010DD96F0 | 0x120B
WP = 0x0000000000000002 | LP = 0x0000000010DD96E0 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000000000000 | WM_PAINT
WP = 0x00000000F1011140 | LP = 0x0000000000000000 | WM_ERASEBKGND
WP = 0x0000000000000000 | LP = 0x0000000010DD8530 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000000 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000000 | LP = 0x0000000010DD8400 | 0x1207
WP = 0x0000000000000001 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000001 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000001 | LP = 0x0000000010DD8650 | 0x1207
WP = 0x0000000000000002 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000002 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000002 | LP = 0x0000000010DD8650 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000010DD8530 | 0x1207
WP = 0x0000000000000000 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000000 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000000 | LP = 0x0000000010DD8400 | 0x1207
WP = 0x0000000000000001 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000001 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000001 | LP = 0x0000000010DD8650 | 0x1207
WP = 0x0000000000000002 | LP = 0x0000000000000000 | 0x120F
WP = 0x0000000000000002 | LP = 0x0000000010DD8910 | 0x120B
WP = 0x0000000000000002 | LP = 0x0000000010DD8650 | 0x1207eher

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