Michael Van Canneyt a écrit :
On Wed, 24 Jan 2007, Michel Meunier wrote:
Michael Van Canneyt a écrit :
On Wed, 24 Jan 2007, Michel Meunier wrote:
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and IT DOESN'T WORK, why? It is exactly the same code!
More and more I think I am going to translate my code in C, because FPC
seems
unable to manage properly dll library.
It has nothing to do with FPC.
1. Compile the DLL without debug info.
(lazarus compiles it by default with debug info included. Disable that)
it's the case
2. ALWAYS specify the complete path to the DLL. Do NOT assume that
the program is started with as the current directory the program
directory. This is a common mistake.
Ok, I have tried, and the problem is the same :-(
1. What is the return value of LoadLibrary ? Have you checked it ?
the return value is 0
2. If it is <>0 immediatly get the last error: raiselastoserror.
This should give you at least a hint why windows thinks it can't load your
library.
when I make a test with Lazarus, I get this message:
project raises exception class 'External: SIGSEGV'
and next, in another window:
execution stopped
Adress: $7C92E183
procedure: ntdll!LdrFindRessource_U
File:
And I have also replaced my 'testdll.dll' by a dll compiled with Delphi
and next renamed 'testdll.dll', and it's ok, so the problem is with
the library compile with FPC.
3. Did you specify $APPTYPE GUI in the library as well ?
If not, do so. Otherwise the library will try to initialize the terminal,
when it cannot: there is none, since the loading program does not have one!
I have added:
{$APPTYPE GUI}
just after 'library dlltest;' in the code and no change.
4. You can also try vice versa: specify apptype console in your GUI program.
The GUI will still run, but in addition a terminal will be opened, allowing
the library to initialize it.
I have added: {$APPTYPE CONSOLE} in the GUI program to test the dll, and
no change.
Can you test all this, please ?
Michael.
OUPS, i have found the solution, in the linking part, the option -gl was
set, it's difficult to translate in english, but it's to insert the
number of lines in case of debug. And now it's working!! Whaou, thanks a
lot for your help.
--
Michel Meunier
Web: www.etoiles-a-bleau.fr
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