Can't register custom filter."g_hInst != 0 ..."

Question

I tried to write my own filter. When i tried to register it, I got this message.
g_hInst != 0
At line 387 of D:\Program Files\DXSDK\Samples\C++\DirectShow\BaseClasses\dllsetup.cpp
Comtinue?

Anyone can tell me why this happens?

this is my code maybe related.
//////////////////////////////////////////////////////////////////////////////

extern "C" BOOL WINAPI DllEntryPoint(HINSTANCE, ULONG, LPVOID);
BOOL WINAPI DllEntryPoint(HANDLE hModule, DWORD dwReason, LPVOID lpReserved)
{
    return DllEntryPoint((HINSTANCE)(hModule), dwReason, lpReserved);
}

STDAPI DllRegisterServer()
{
    return AMovieDllRegisterServer2( TRUE );
}

STDAPI DllUnregisterServer()
{
    return AMovieDllRegisterServer2( FALSE );
}

Answer 1

Shouldn't that be:

 

Code Snippet

extern "C" BOOL WINAPI DllEntryPoint(HINSTANCE, ULONG, LPVOID);

BOOL WINAPI DllMain(HANDLE hDllHandle, DWORD dwReason, LPVOID lpReserved)

{

return DllEntryPoint(reinterpret_cast<HINSTANCE>(hDllHandle), dwReason, lpReserved);

}

 

 

 

Your DllEntryPoint is calling itself?  The official DllEntryPoint() is in the baseclasses and calls _DllEntryPoint() in the same module that initializes the CRT.

 

Either implement DllMain() as your entry point or change the entry point for the DLL to DllEntryPoint() and remove your implementation.

Answer 2

Thank you Chris P.!

Answer 3

Hi Chris,

unfortunately, that won't work for me either. If I implement DllEntryPoint, an error appears that DllEntryPoint was already declared (baseclasses). If I set "DllEntryPoint" as my entry point for my DLL, I get the error that DllEntryPoint is unresolved.

What's wrong?

Thank you

Edit:
Whoops! I used the debugging version of the baseclass library. Works fine now (no implementation or setting of the entry point necessary).
So, the registration works fine but for some reason I can't use the filter -> "The filter could not be created. Resources used by this filter may already be in use." Well, I'm not using that filter at the same time, that's for sure.
Code: 0x800401F9

Edit2:
Here's the solution
I forgot to mention that I use MFC, so the story with the entry point causes the problems.
Solved now!