Hi!
Had some problems sending a WM_COPYDATA-Message from one Window to
another. (See forum:
http://www.lazarus.freepascal.org/index.php?name=PNphpBB2&file=viewtopic&t=3973
)
As no one in the forum found a bug in my code I tried to track down the
problem myself.
As I'm new to the source of Lazarus and the LCL I'm not quite shure that
I looked at the right place, but I've found a possible solution to this
problem.
The function WindowProc in lcl\interfaces\win32\win32callback.inc
revieves the WM_COPYDATA-Message but has no handler for it.
In line 1081 of the file a 'case Msg of' starts the handling of the
different Messages.
I added the following lines:
WM_COPYDATA:
Begin
LMessage.Msg := Msg;
LMessage.WParam := WParam;
LMessage.LParam := LParam;
WinProcess := false;
End;
so the WM_COPYDATA message gets handled same as WM_USER - just pass it
on to some user-defined handler.
Can someone who knows the LCL-Code better than I do post a comment on
that workaround? Or perhaps point me to another place to look for a
solution?
For my current problem it works as expected - but I don't know if it's
really a 'solution'...
Thanks
Lukas
--
----------------------------
software security networks
Lukas Gradl <lazarus#ssn.at>
Eduard-Bodem-Gasse 9
A - 6020 Innsbruck
Tel: +43-720-300168-0
Fax: +43-512-341033-19
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