Opened 14 years ago

Closed 12 years ago

#1492 closed Bug (No Bug)

Problem with listview AND $WS_EX_COMPOSITED in a gui

Reported by: funkey Owned by: Jon
Milestone: Component: AutoIt
Version: Severity: None
Keywords: Cc:

Description (last modified by Valik)

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)


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

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

Attachments (0)

Change History (7)

comment:1 Changed 14 years ago by Jpm

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


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 ...

comment:2 Changed 14 years ago by anonymous

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

comment:3 Changed 14 years ago by Jpm

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.

comment:4 Changed 14 years ago by Jpm

I just read
and as I understand it can be hard to manage ...

comment:5 Changed 14 years ago by Jpm

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

comment:6 Changed 14 years ago by Jpm

  • Owner set to Jon
  • Status changed from new to assigned

comment:7 Changed 12 years ago by Valik

  • Description modified (diff)
  • Resolution set to No Bug
  • Status changed from assigned to closed

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.

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as closed The owner will remain Jon.

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