Problem with listview AND $WS_EX_COMPOSITED in a gui

[funkey]

I have high CPU load and there is no listview visible.

;Problem with listview AND $WS_EX_COMPOSITED in a gui

$Form1 = GUICreate("Bug-Test", 200, 200, -1, -1, -1, BitOR(0x02000000, 0x00000010)); $WS_EX_COMPOSITED, WS_EX_ACCEPTFILES))
$hLV = GUICtrlCreateListView("", 10, 10, 180, 180)

GUISetState(@SW_SHOW)

While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case -3
            Exit
    EndSwitch
WEnd

AutoIt:3.3.4.0 (Os:WIN_XP/X86/Service Pack 2 Language:0407 Keyboard:00000407 Cpu:X64)

[J-Paul Mesnage]

I don't know why you need to use such extended style but MSDN doc say

WS_EX_COMPOSITED

Paints all descendants of a window in bottom-to-top painting order using double-buffering. For more information, see Remarks. This cannot be used if the window has a class style of either CS_OWNDC or CS_CLASSDC. 

That exactly what Autoit is using for GuiCreate. I plan to reject this extended style. I think everybody will agree ...

[anonymous]

And how to reduce flickering while resizing? $WS_EX_COMPOSITED works great for that.

[J-Paul Mesnage]

I am afraid to suppress th CS_OWNDC that currently AutoIt is setting when creating a GUI.
Valik mention that the AutoIt must be subclass when using such extended style to have your own behavior.

[J-Paul Mesnage]

I just read ​http://www.codeguru.com/forum/showthread.php?t=324061
and as I understand it can be hard to manage ...

[J-Paul Mesnage]

I am not able to fix such behavior the suppression of CS_OWNDC as I try to do it does not help either.
I leave to other Dev the final answer on this ticket

[Valik]

This is not a bug. The documentation for WS_EX_COMPOSITED says it is not compatible with the CS_OWNDC or CS_CLASSDC class styles. Closing as no bug.