Some DLL questions !!!

[HadiRezaee]

Hi there,
Please answer to my questions about DLL …

Q1.
I want to write simple function in a Win32 DLL project …
And call that by LoadLibrary …

I made a Win32 DLL project …
Then I wrote this function in .h file:

__declspec(dllexport) void SayHello();

And I wrote it in .cpp file:

void SayHello()
{
MessageBox(NULL, “Helllllllllo !”, “Info”, MB_ICONINFORMATION);
}

Then I compiled it without any problem …
In my MFC exe project …
I loaded that:

CoInitialize(NULL);
HMODULE hModule = LoadLibrary( "test4.dll" );

FARPROC procFunc;
procFunc = GetProcAddress(hModule, "SayHello"
(procFunc)();

FreeLibrary(hModule);
CoUninitialize();


There is no problem in DLL path file, I checked it …
But when I run this code, program show me this error:
“Unhandled exception in testdll.exe : 0x0000005 : Access violation.”

What is my wrong ?


Q2.
If I write a DLL by MFC DLL, can I use of that from other programming language like Delphi or VB ?

 

[williamu]

Include this in SayHello()
{
AFX_MANAGE_STATE(AfxGetStaticModuleState( ));
rest of code....
}

And in all other functions in the DLL.

HTH


William
Software Engineer
ICQ No. 56047340

 

[HadiRezaee]

Hi,
Thanks for your reply ...
But my project is based on Win32 DLL, that is not MFC DLL ...

When i write it in my function, i got some linking error !!!!

Plz help me !