OpenEuphoria

Re: Windows XP wierdness

• Posted by Derek Parnell <ddparnell at bigpond.com> May 16, 2003
• 386 views

On Fri, 16 May 2003 10:42:23 +0930, <daryl_vdb at hotmail.com> wrote:

>
> This is not OT
>
> There seems to be some problems with win32lib on windows XP.  The wierd 
> part about it is that it only shows up when the "modern style" theme is 
> used.  I didn't notice it until recently because I always use the classic 
> windows 2000 look on my computer, and all my windows euphoria programs 
> work fine.  But when I switched to the modern theme, my wave editor 
> crashed on startup.  The error was "variable not assigned a value".  The 
> variable causing the problem is initially assigned a value in the 
> w32HResize event, which should occur when a window is opened.
>
> It became ovbious that the w32HResize event is not occurring when the 
> window is opened.  But how could the theme be causing this?  You would 
> think a theme would affect only the look of the window, not its 
> behaviour.
>
> Even wierder is the fact that I tried calling setRect in the main 
> window's open event (it's a child window that's causing the problem) to 
> trigger a resize event, and it still didn't work.
>
> I don't know whether this is a bug in win32lib or another stupid decision 
> by microsoft.  If anyone else knows about this, any help to solve the 
> problem would be appreciated.  I'm using win32lib 0.57.9 (maybe that's 
> the problem?).
>

Win32lib invokes the w32HResize event handler when it receives either the 
WM_SIZE message or the RBN_HEIGHTCHANGE notification. It sounds as if XP is 
not sending either of these messages at Window Open time. I do not know 
why. I guess we can't assume that Windows will do this (it always sounded 
rather strange thing to do anyway). May I suggest you do you initialization 
with the w32HActivate event instead.


-- 

cheers,
Derek Parnell