https://bugs.winehq.org/show_bug.cgi?id=54194
--- Comment #1 from François Gouget fgouget@codeweavers.com --- WM_USER (c000) can also get a permission denied error, still on Windows 7. For instance on 2023-07-31 on w7u_adm:
msg.c:17741: Test failed: 4: message c000, got 0, error 5 msg.c:17746: Test failed: 4,0: message c000, got 0, error 5 msg.c:17746: Test failed: 4,1: message c000, got 0, error 5 msg.c:17746: Test failed: 4,2: message c000, got 0, error 5 msg.c:17746: Test failed: 4,3: message c000, got 0, error 5 msg.c:17746: Test failed: 4,8: message c000, got 0, error 5 msg.c:17746: Test failed: 4,9: message c000, got 0, error 5 msg.c:17746: Test failed: 4,10: message c000, got 0, error 5 msg.c:17746: Test failed: 4,11: message c000, got 0, error 5