[Interest] Qt 5.2 winextras - QWinJumpList

Constantin Makshin cmakshin at gmail.com
Tue Feb 11 05:23:38 CET 2014

I found two functions used in QWinJumpList which, according to MSDN, was
introduced in Windows XP SP2.

Dependency Walker (http://www.dependencywalker.com) might help you
pinpoint the source of the problem.

On 02/11/2014 07:56 AM, Constantin Makshin wrote:
> I looked at the QWinTaskbarButton source code (QWinTaskbarProgress is
> just a convenience class that delegates all interaction with the OS to
> QWinTaskbarButton) and didn't find anything suspicious, the only
> "importable" function it uses is definitely available in XP.
> So my guess is that the incompatibility is caused by another part of
> QtWinExtras, not taskbar button/progress.
> On 02/05/2014 02:02 PM, Miroslav Špehar wrote:
>> Thanks for the answer, but it might help if i paraphrased the question:
>> will creation of taskbar progressbar object on a binary used for windows
>> xp cause a problem?
>> According to Nurmi's answer - it shouldn't, because of expressed
>> optionality in the docu (quote: "In addition, you *can *use...").
>> The idea is to build an app which will show taskbar progressbar on
>> windows 7+, but not show it (because it doesn't exist) on windows xp. 
>> The same .exe should be used on both operating systems. 
>> As I'm seeing it - it doesn't work this way even though documentation
>> suggest it should (since the app i'm testing it on doesn't work on
>> winxp, but works on win7), so I'm looking for some confirmation/suggestions.
>> Maybe a hint of some opensource application that uses it so i could
>> examine its code?
>> Regards, Miroslav.
>> On Mon, Feb 3, 2014 at 9:11 AM, Sze Howe Koh <szehowe.koh at gmail.com
>> <mailto:szehowe.koh at gmail.com>> wrote:
>>     Hi,
>>     On 30 January 2014 22:50, Miroslav Špehar <mspehar at gmail.com
>>     <mailto:mspehar at gmail.com>> wrote:
>>     > Thanks, for the answer, i am already aware of this example.
>>     > There is even somewhere in documentation mentioned that filetype association
>>     > is needed so 'recent' jump list would be shown. Is there some kind of
>>     > prerequisite for 'tasks' jump list?
>>     I don't know the answer to this one, but...
>>     > Also, an application compiled with bundled minigw and ran on windows xp
>>     > shows error(s) when winextras are used (taskbar progress). The error is some
>>     > dll entry point not found. Is it not supported on win xp?
>>     > It runs fine on windows 7 though.
>>     ...Taskbar progress bars are a new feature in Windows 7:
>>     http://msdn.microsoft.com/en-us/library/windows/desktop/dd378460(v=vs.85).aspx
>>     <http://msdn.microsoft.com/en-us/library/windows/desktop/dd378460%28v=vs.85%29.aspx>.
>>     They did not exist in XP and Vista.
>>     Regards,
>>     Sze-Howe
>> -- 
>> How much wood could a woodchuck chuck if a woodchuck could chuck wood?

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