[fpc-devel] Incompatibilities between win32 windows unit and wince windows unit

alvise.nicoletti at siteland.it alvise.nicoletti at siteland.it
Mon Jan 8 09:13:48 CET 2007

I'm using Lazarus to do an application for WinCE that takes data from a 
local mysql database.

Doing the GUI staff was not hard, and i still didn't see any differences 
between wince and win32, except for some bug or "special functions" like 
the drag&drop on TLists objects that i wanted to use (i resolved 

Now Almindor is trying to port his lnet libs into wince (cause there 
seem to be no mysql support for wince), i think that THIS would be the 
primary target for WinCE cause compiling without network support is 
compiling a useless software... and no button-component-image can make 
it less useless.

If you have any ideas they would be very appreciated.

p.s. for wince testing i'm always here, but i'm not enough expert for 
developing patchs.
> 2007/1/7, Aleš Katona <almindor at gmail.com <mailto:almindor at gmail.com>>:
>     On Ne, 2007-01-07 at 00:23 -0200, Felipe Monteiro de Carvalho wrote:
>     > Hello,
>     >
>     > I am porting fpgfx to Windows CE. During this work I noticed a
>     lot of
>     > incompatibilities between win32 windows unit and wince windows
>     unit.
>     > Trivial stuff, like a parameter is var on win32, but is a pointer on
>     > wince.
>     >
>     > Is there any special reason why it´s like that? Should we try to get
>     > both units as compatible as possible? Can I send a patch for that?
>     >
> All patch / comments /remarks are welcome :)
>     > thanks,
>     I'm not an expert on the windows unit but I encountered similar
>     problems
>     among platforms and I think we should defenetly go for compat. The
>     best
>     thing you can do (so nobody can say anything) is "complement" both
>     ends.
>     So eg:
>     you got this in 2 windows unit:
>     W1. function A(const data): Pointer;
>     W2. function A(data: Pointer): Pointer;
>     Best is to complement both W1 and W2 so they both have both overloaded
>     versions. It's not nice, but this way you ensure 100% compat and
>     everyone is happy. Ofcourse since WINCE isn't stable yet it might be
> NO, fpc wince current thrunk is very good, and excellent quality
> (in the past there was some issues during internal linker implementation
> so it was not the case for all svn rel but since a few months it's 
> very good)
> wince api is not complete but i can say you that fpc-arm-wince is 
> waiting for the 2.2 :)
>     cleaner to just copycat the windows ones into it.
>     Ales
> this is what i did since more than one year,
> actual wince api was first inherited from last year win32.
> i copy/paste them, then removed unexisting wince funcs
> and then start adding new ones.
> at the beginning i keepts possible common files for both win32/wince
> using ifdef. (you can look in 3month old svn inc files)
> but after one year i saw that nobody have interest on that.
> only recently ifdef and win32 declarations where removed. why ?
> 1°)calling conventions are differents, some type/record have same name 
> but are differents
> and even M$ have separated sysgen files, possibles futures issues with 
> ce 4.2, 5, 6 versionning
> that can introduce also ifdefs
> 2°)it was discussed last year here and florian+yuri thinked it was 
> better to separate
> i was first against this but finally be convinced
> now, every time i can test some new api,  i add them
> some are already missing but i've added all api available functions 
> names at the beginning
> of .in files, so any one who need something to be added can drop a 
> line or send a patch
> (here or directly to me) then i'll do my best to check an apply asap.
> in one year i only received 1 patch+request from Rozbeeh and it was 
> applied in less than 24h
> regards
> or
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