AV closing popup menus when inside a DLL

rbuser

I have problems implementing ReportBuilder inside a DLL when the
HostApplication is writen in C++

I made a Dll(delphi) with a Form and a TppReport object

The HostApp loads the DLL
Get the ProcAddress of the function
Call the Dll function
The Report Designer or Preview Forms Shows


But when I right click on Designer o Preview Forms (o wherever a popup is
used) the popup menus causes AV erros when they are closed


I saw the RBuilder\Demos\7. DLL example an works fine ..

Is a problem of the new Toolbar2000 ??


Delphi 2007 Update1
RBuilder 10.06 Server
Windows XP sp2

Jame Garza
Cheers

nicocizik

Hi James,

Besides being called from a C++ applicaiton, how is your dll different from
the demo located in the \RBuilder\Demos\7. DLL\... directory? You mention
that this demo is working correctly so there must be a slight difference in
the implementation of the two.

--
Regards,

Nico Cizik
Digital Metaphors
http://www.digital-metaphors.com

rbuser

Hi Nico
I already send a mail tu support.

I made an example to reproduce the error, I use the same dll of the demo7
Only change the call to the function, I use cdecl and the aAppHandle is
integer but this is always 0

The Designer shows fine and it looks great but the popups are used very
often and AV causes I can't operate Designer correctly.


This is the code of the DLL:

function ShowForm(aAppHandle: integer): integer; cdecl;
var
Form1: TfrmDLL;
begin
// use specified app handle or create a new one, as needed}
if (aAppHandle <> 0) then
begin
Application.Handle := aAppHandle
end
else
Application.CreateHandle;

{create the form}
Form1 := TfrmDLL.Create(nil);

{must be modal for DLL calls (never modeless) }
try
if Form1.ShowModal = mrOK then Result := 0 else Result := -2;
finally
Form1.Free;
end;

end;


Regards
Jame Garza

rbuser

Hi

I send another mail to support but I have not received answer, I just want
to know if there will be a solution or if they recibed my mails

These is an error very very easy to reporoduce ..

I have one HostApp in C++ and one HostApp in Delphi and just one Dll (with a
form an ReportBuilder inside)

Calling the dll from HostAppDelphi - the popups in the designer works fine

Calling the same dll from HostAppC - the popups in the designer raises an
access violation when the popups closes

The calling convention to the function in DLL are the same in both projects,
the projects are very simple

These errors not happend in RBuilder 7.04, maybe something with the new
Toolbar2000 causes these AV

Or there is a way to use the "old popups" (TPopup) in ReportBuilder, maybe
these solve the problems

Can I send to these newsgrou an attachment with these examples ??


Any help is grateful
Many Thanks

James Garza





"James Garza" escribi? en el mensaje

nardmoseley

- I do not know what is causing the AV. You sent an example to
support@digital-metaphors.com, but it will run. There are errors about
missing MFC dll's. We do not use MFC or C++ here at all.

- when running a Delphi app, there are some VCL initializations that occur
for the Application object, the controls unit, etc. You can trace the VCL
source code to see these. Perhaps some of those need to occur when calling
from the C++ app. Just a guess.

- If possible try use the debugger to attach to the process and debug the
code in the Delphi .dll to see where the error occurs and then examine the
call stack.



--
Nard Moseley
Digital Metaphors
www.digital-metaphors.com