FreeLibrary vs implicit unloading DLL
- by Adil
I have implemented a DLL including DllMain() entry function:-
BOOL APIENTRY DllMain( HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
case DLL_PROCESS_ATTACH:
...
case DLL_THREAD_ATTACH:
...
case DLL_THREAD_DETACH:
...
case DLL_PROCESS_DETACH:
...
}
Unfortunately i made a mistake in DLL_PROCESS_DETACH case and accessing illegal memorey (access violation).
I made a sample program which loads the library using LoadLibrary() function, uses the library function and finally call FreeLibrary() and return.
When i executed this program, i didnt get any error message.
But if i remove FreeLibrary(), in that case the DLL_PROCESS_DETACH case is executed implicitly and this time it gives error dialog box mentioning that there is access violation.
Why calling FreeLibrary() suppress this error? OR internally it handles this exception?
What is suggested way.
