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nwongfeiying
Grandmaster Cheater
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Joined: 25 Jun 2007
Posts: 695
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 Posted: Mon Jul 06, 2009 8:27 pm Post subject: [C++] Loading functions from a DLL |
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WOS.exe is the executable and WML.dll is the library. WOS loads up the library and attempts to load up the function, but fails UNLESS the name of the function name is "main".
Here is the code that is functional:
| Code: |
bool main();
{
/* code */
}
funcAddr = (FUNC)GetProcAddress(hinstDLL, "main");
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This code results in WOS unable to load up the function address:
| Code: |
bool loop()
{
/* code */
}
funcAddr = (FUNC)GetProcAddress(hinstDLL, "loop");
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And this is the error handler I'm using:
| Code: |
if(NULL != funcAddr);
cout << "Function loaded." << endl;
else
cout << "Unable to load function." << endl;
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What could I be doing wrong? And also, is there a way to _declspec(dllexport) all of the functions at once?
Edit: It looks like CEF's code parser has gone crazy. I'll add a pastebin link.
http://pastebin.com/me202092
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&Vage
Grandmaster Cheater Supreme
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Posts: 1053
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| Posted: Mon Jul 06, 2009 8:54 pm Post subject: |
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| Check and see if the export names are right. MSVC tends to change the export's name.
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lurc
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Joined: 13 Nov 2006
Posts: 1900
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| Posted: Mon Jul 06, 2009 9:39 pm Post subject: |
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If you do not include a .def file with the dll and state the library & exports in that file the compiler will mangle the export names up.
Module.def:
| Code: | LIBRARY libName
EXPORTS
ExportFunction1
ExportFunction2 |
Main.cpp:
| Code: | | DWORD dwExportFunction1Addy = GetProcAddress(LoadLibrary(_T("libName.dll")), "ExportFunction1"); |
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nwongfeiying
Grandmaster Cheater
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| Posted: Mon Jul 06, 2009 10:07 pm Post subject: |
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| Is there a way to _declspec(dllexport) all of the functions at once?
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lurc
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| Posted: Tue Jul 07, 2009 11:22 am Post subject: |
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No you must include the prefix before each function you wish to export.
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nwongfeiying
Grandmaster Cheater
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| Posted: Tue Jul 07, 2009 11:35 am Post subject: |
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| lurc wrote: | | No you must include the prefix before each function you wish to export. |
I feared so 
Anyhow, after I saw your reply, I researched .DEF files on MSDN and I got this result:
http://msdn.microsoft.com/en-us/library/a90k134d(VS.80).aspx
The point of _declspec(dllexport) is to remove the need for .DEF files?
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lurc
Grandmaster Cheater Supreme
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| Posted: Tue Jul 07, 2009 7:59 pm Post subject: |
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hmm... That is indeed correct.
Have you tried to include the .DEF file anyways to see if it demangles the export names?
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nwongfeiying
Grandmaster Cheater
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Posts: 695
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| Posted: Tue Jul 07, 2009 9:52 pm Post subject: |
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| I have not yet, but I'm going to try soon. I've been juggling work on my website and my projects.
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edwin5254
How do I cheat?
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| Posted: Wed Jul 08, 2009 12:25 am Post subject: |
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try
extern "C" _declspec(dllexport)
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BanMe
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Location: Farmington NH, USA
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may not be as cool as dynamic loading as is lurc's method, but it works 