Monday, April 21, 2008

Problems Faced in registering the Filter DLL in Windows CE

Problems Faced in registering the Filter DLL in Windows CE:
-----------------------------------------------------------
I faced the problem in registering the DLL ;
Solution:
-----------
There is no such file to register the DLL in Windows Mobile Emulator evnvironment like regsvr32 ;
So I developed the my own version of RegSvr32 application with the help of MSDN KB Code;
My Register application will do the following:
1.Loads the DLL
2.GetProcAddress() fn to get the address of the "DllRegisterserver" and call it;
3.Unloads the DLL;
Now it was registered in to the registry;








Because the .def file is not included in DLL project input; what it means was
within this .def file we specified the DLL functions as follows:
DllRegisterServer
DllUnRegisterServer
Then only we will get the correct address of the DllRegisterServer fn. otherwise we will get Null pointer;



One More problem I faced while calling the DllRegisterServer() fn address from My Register application:
The application was hanged and not giving any error, I got the execption within that fn;
I am not able to figure out the problem;


Solution:
-------------
So I checked the MSDN documentation as follows:
For Windows CE,we need to do the following:
STDAPI DllRegisterServer()
{
return AMovieDLLRegisterServer( );// Windows Desktop- AMovieDLLRegisterServer2(TRUE) - these are not supported in WinCE
}
STDAPI DllUnregisterServer()
{
return AMovieDLLUnRegisterServer( ); //Windows desktop-AMovieDLLRegisterServer2(FALSE)to unregister-these are not supported in WinCE
}
However, within DllRegisterServer and DllUnregisterServer you can customize the registration process as needed.
One more thing we need to
CFactoryTemplate g_Templates[] =
{
{
g_wszName, // Name.
&CLSID_SomeFilter, // CLSID.
CSomeFilter::CreateInstance, // Creation function.
NULL,
&sudFilterReg // Pointer to filter information.
}
};
int g_cTemplates = sizeof(g_Templates) / sizeof(g_Templates[0]);

LPAMOVIESETUP_FILTER CSomeFilter::GetSetupData() //we must implement this one for Windows CE
{
return (LPAMOVIESETUP_FILTER) & sudFilterReg;
}

1 comment:

Unknown said...

hi

please can send your application to see it and try it because i have saome problem and can't regitser com dll in windows ce image

eng.jeblak@gmail.com

thanks